The nüdie period cup is made from the highest quality medical-grade silicone. This means that the manufacturing process takes place using clean-room technology, in completely sterile conditions.
Silicone is made from combining silicon (the earth’s second most abundant element, after oxygen) with a tiny amount of carbon and hydrogen, creating a hypoallergenic rubber-like material with low toxicity, high heat resistance and flexibility. Perfect for the nüdie!

The nüdie is made from hypoallergenic medical-grade silicone with a silky smooth finish designed for extra comfort.

We have trademarked a number of design modifications to create what we think is the best period cup on the market.

Rather than a stem that often needs cutting, leaving a rough edge, we created our own design easy-to-hold Pebble™ pull for hassle free removal.

We added a smooth rounded rim for easy insertion and a secure hold and reinforced the connection between base and pull (so it doesn’t feel like the pull will come away from the base!)

And we spent a while testing three vs. four air holes. Three won out. With fewer of them, our Tri-flow™ air release holes are easier to keep clean – win-win.

Period pads and panty liners sit inside your underwear to catch and absorb menstrual blood. Tampons and period cups require vaginal insertion and provide internal menstrual protection. Whereas a period cup collects the blood, a tampon absorbs it. A tampon can be used only once whereas the nüdie is completely reusable and can be used for many years.

Period cups have a much larger capacity than pads and tampons, and can be worn for up to 12 hours. Whereas all &SISTERS tampons and pads are made from 100% organic cotton, the nüdie is made from medical-grade silicone. Period cups are the best option for women who suffer from heavy periods.

The absorbing capacity of a tampon is given in grams (g) and the capacity of the period cup in millilitres (ml). One ml of period blood is comparable with a gram. Dependent on size, the nüdie has a capacity of 18–32 ml. The absorbing capacity of a tampon is 6-18 g. A period cup can hold the equivalent of 3 tampons’ worth of blood.

The nüdie is available to buy on our website here.

The nüdie is available in 3 sizes: Small, Medium and Large.

The Small is ideal for users under the age of 18. The diameter of the small is 38mm and the overall length including the pebble is 56mm, with an 18ml capacity.

The Medium is designed for women aged 18 to 30 who have not given birth vaginally. The diameter is 42mm and the overall length including the pebble is 61mm, with a 24ml capacity. If you have a light flow, the Medium is likely to be your best option. Light flow is categorised by spotting or very light – light bleeding. If you are over 30 with a highly active lifestyle with strong pelvic floor muscles this could be the best fit for you.

The Large is perfect if you have given birth vaginally or are over 30 years old. The diameter is 46mm and the overall length including the pebble is 66mm, with a 32ml capacity. However if you are over 30, have strong pelvic muscles and a highly active lifestyle you may want to consider the medium.

We try to make sizing as straightforward as possible however if you run into any difficulties with your purchased size we are more than happy to exchange it for an alternate size. Sizing is not an exact science as we are all different but the better you know yourself the easier it is to choose a size that fits in with you and your lifestyle.

The nüdie is made from the most flexible and robust highest grade medical silicone available. Silicone can vary in its rigidity which is a huge factor in your comfort when using a period cup.

When we began this journey we tried, tested and felt a whole range of cups available on the market. This enabled us to create a cup with just the right level of resistance that should be comfortable for majority of women. Our cups are soft enough to ensure a high level of comfort however not so soft that when applied properly they will leak.

Our small and medium cups are soft in texture but relatively firm so as to fold easily, with enough resilience to pop open inside the vagina. Our larger cup is a little less firm to allow for an easy release once inserted (ideal for those with weaker pelvic floor muscles).

We want all our customers to be 100% satisfied with their period cup. It is an intimate relationship and one that we hope will last for a number of years. If you think that you have selected the wrong size, we are happy to offer free exchanges and returns (within 30 days). Simply contact us via email at [email protected].

We dispose of all exchanged nüdie cups in the most environmentally friendly way or thoroughly clean and sanitise them and use as demonstration models!

We want all our customers to be 100% satisfied with their nüdie period cup. If you feel that you have ordered the incorrect size, we offer free exchanges or returns (within 30 days). All exchanged nüdie cups are disposed of in the most environmentally friendly way or thoroughly cleaned and sterilised and used as demonstration models!

You can use a period cup if you have an IUD/IUS, a contraceptive ring, or any other form of birth control. Please note that the nüdie is completely hormone-free and therefore does not provide contraceptive protection.

You can go to the toilet as you normally would when you’re wearing your nüdie. After a bowel movement, you might want to check that the cup is still sitting properly. Take extra care to wash your hands thoroughly.

The nüdie is perfect for playing sports or undertaking fitness activities. The absence of a string is an added bonus for swimming on your period. Using the nüdie whilst travelling is also ideal. It holds three times more blood than a tampon or pad, meaning less toilet stops along the way. Best of all, period cups are completely reusable, so you won’t ever run out or worry about disposing of used disposable period products.

Absolutely! Period cups are ideal for night, as they can be kept in for 12 hours. If you have a very heavy flow, you may want to use one of our organic cotton night-time pads for extra protection whilst you sleep.

Your nüdie may be leaking for a number of reasons. Most likely it’s because you didn’t insert it quite right to enable the cup to fully open and for suction to be formed between the rim and the sides of your vagina. The suction is how the cup prevents leaks, so use your finger to check if it is fully unfolded. If you can feel the cup moving around, you probably need a larger size. If you find that the ‘Large’ size leaks, then it could be that you have quite weak pelvic floor muscles. Pelvic floor exercises can be very effective at strengthening the vaginal wall muscles that hold the cup in place.

Other possibilities are that you’re using the wrong sized cup (too large or too small), or have an unusually positioned cervix. (see FAQ on cervix heights below)

Alternatively of course you may just have an exceptionally heavy flow day and left your nüdie in for too long!

Don’t worry! It is impossible for the nüdie to become stuck or ‘lost’ in your body. Removing your period cup can be tricky at first, but we promise it will come natural after a few tries. When removing the cup, always remember to use your own pelvic floor muscles. Push the cup down with your pelvic muscles until you can get a firm grip on our specially designed Pebble™ pull. Pinch the bottom with your forefinger and thumb to release the suction. Then keep pushing while slowly pulling the cup out. You can also rock it from side to side if necessary.

If you are having issues removing the cup, with clean hands try sliding your finger between the cup and vaginal wall, and bend your finger when you reach the rim. Be careful if you have long fingernails! Gently pull the stem of the cup downwards until you can reach and grip the base of the cup. Pinch the base to release the suction and remove gently.

No. The nüdie does not absorb or interfere with the natural pH of your vagina. Thrush is caused by candida, a yeast-like fungus that can occur when the natural balance of your vagina is disturbed. Avoid using perfumed soaps to clean your cup and when washing your vaginal area as this can also disturb your pH balance.

We advise that you wait till your infection has cleared before resuming using your nüdie. The nüdie does not absorb or interfere with the natural pH of your vagina however in most instances you need to allow your vaginal bacteria to restore itself so it is best to give your insides a little rest.

We recommend that you don’t keep it in for longer than 12 hours.

Period cups are relatively easy to clean. There are three stages to keeping it bacteria and stain-free: daily cleaning, cleaning at the end of your period before storing for the next month and the infrequent removal of stains.

There are several methods for daily cleaning but it may depend more on when and where you are that may make one method more preferable to another. If you’re out in public, a paper tissue and a bottle of water is fine. You don’t technically need to clean your nüdie every time you empty it so it’s whatever you feel comfortable with. However, we do recommend that you give your cup a thorough rinse at least once a day. Do ensure that when you are abroad you only use drinking water to clean your nüdie. Cleaning your nüdie well can help to hinder the build up of stains over time so as long as you look after it, it will look after you.

The cleaning agents mentioned below should be avoided as they’re not designed to be used internally and may compromise the condition of the nüdie:

  • Scented/ fragranced or anti-bacterial soaps
  • Vinegar
  • Tea-tree oil
  • Oil based soaps
  • Rubbing alcohol
  • Hand sanitiser
  • Pre-moistened wipes
  • Hydrogen peroxide
  • Other harsh chemicals
  • Dishwasher/ dishwashing detergent tablets

At the end of your period you should sanitise your nüdie. Boiling is the most conventional way to sanitise your cup. This involves simply popping it in a pan of boiling hot water for 5 minutes. When boiling you can actually place it within a metal whisk (top tip!) to ensure it doesn’t come into contact with the bottom of the pan.

Sterilisation methods include baby bottle sterilisation tablets or fluids, such as Milton (a firm favourite amongst midwives and mothers). Their tablets and fluids are able to eradicate all bacterial, fungicidal and virucidal agents in 15 minutes. Other easy-to-use sterilisation methods include microwaveable sterilisation bags.

Try to avoid sterilising solutions with harsh chemicals or oils as these may cause disruption to the bacterial population of your vagina. Always check the ingredients of any product that is going to go inside your body. If you don’t feel comfortable with something, don’t use it.

We recommend that you avoid popping your cup in the dishwasher. Dishwasher detergent tablets contain chemicals that aren’t so vagina-friendly.

In addition to sterilisation make sure to clean the tri-flow holes with a (dedicated!) toothbrush to ensure that the cup is fresh and clean for your next cycle .

After disinfecting, dry and store your cup, ready for next month. Between periods, store your period cup in the specially designed cotton bag provided. The hypoallergenic and breathable material ensures an optimum environment for the cup, allowing any moisture to evaporate. Don’t store your cup in an airtight container, as it needs ventilation.

Your nüdie may become a little stained after a number of uses. This is simply a result of the hormones and the chemical balance of each woman’s vaginal fluids. Don’t worry if your cup becomes a little discoloured, its effectiveness will not be compromised.

Periodically you may find that your cup is beginning to stain or become discoloured. Although staining will not affect the overall effectiveness of your cup, it probably doesn’t look so appealing! To freshen it up and remove the stains, we suggest soaking in a diluted vinegar solution. However, please do make sure to remove all traces of the vinegar, using your preferred sanitisation method, before re-using your cup. We do not recommend removing the stains on your cup more often than on a quarterly basis, as this can affect the quality of the silicone over time.

Depending on how well you take care of it, each nüdie period cup is made to last for up to 10 years. Some users prefer to change theirs more regularly, if discolouration is off-putting.

Checking the height of your cervix is important in choosing the right period cup. It can also help you to monitor your ovulation, fertility and sexual health. You should aim to check it several times a week over a month to get a good idea of the general height of your cervix. Your cervix does tend to change position during your cycle. When you are ovulating your cervix will be higher than normal and when you are menstruating your cervix will be lower than normal.

If you haven’t done this before we recommend doing this during a shower or a bath so you are clean and relaxed.

Insert your index finger into your vagina in an upwards direction towards your cervix which should feel similar to the tip of your nose. Note the position to which your finger is able to reach and use the knuckle rule to determine your overall cervical position.

A low cervix will measure up to the first finger joint. A medium cervix will measure up to the middle joint, roughly halfway up your finger and a high cervix will allow you to insert your finger all the way in before you reach your cervix.

If you have done this successfully, congratulations you now know the height of your cervix!

It depends how low your cervix is, if it’s really low and you can’t even reach your first finger joint then possibly not. This is fairly unusual and there are cups on the market that are better suited than the nüdie.

In most other instances, if you have a low to medium height cervix, you could drop a size, and go for our ‘Small’ and ‘Medium’ sizes, rather than the ‘Large’ which are appropriate for women with cervixes of all heights. If you are over 30 and have a low cervix we would encourage you to opt for our medium cup as it has a cup height which is likely to be a lot more comfortable for you. Don’t worry if you have a heavy flow, it simply means you may have to change once or twice more than you might otherwise but we think that comfort is key!

Unfortunately the nüdie cup can’t be recycled through domestic recycling facilities, only industrial facilities. If yours is at the end of its lifespan or you just don’t need or want it anymore, then please do return it to us and we’ll ensure it’s safely recycled.


Mainstream brands tend not to list their ingredients and probably for good reason. They’re often made from non-breathable, non-biodegradable man-made or synthetic fibres.Every &SISTERS product is made with pure, natural, ethically sourced ingredients. When you buy &SISTERS, you are not only protecting your own health, but also workers’ health, human rights, and the environment. Our organic cotton is Soil Association certified ((DK14305) to the Global Organic Textile Standard (GOTS).

Organic cotton is naturally soft, gentle, absorbent and breathable.

Our 100% organic cotton is grown without the use of fertilisers, herbicides & pesticides.

Most women find that it helps to use different absorbency levels across their period, especially as their flow is often heavier in the first few days. You should also always try to use the tampon with the lowest absorbency to meet your needs.

Absorbency ranges are standard for all tampons, regardless of the material that they’re made from or the manufacturer.

Please use the following chart to help you select the most appropriate absorbency to meet your needs.

You should change your tampon regularly, AT LEAST every 4 to 8 hrs or more often if needed.

If you start to feel your tampon it is a sign that it’s time to change it.

We get asked this a lot.

Fortunately, it’s not possible for a tampon (or cup) to get lost inside your body.

The opening at the top of the vagina into your womb is incredibly tiny and your body won’t allow anything to go up there.

If you can’t feel your tampon, try to relax and have another feel around. You will find it.

First wash your hands, then gently pull on the string and pull the tampon out. This should be easy to do. If not, this may be a sign that you’re changing your tampon too often or using a tampon with too high an absorbency for your flow.

If the tampon feels tightly held, leave it a little longer.

Tampons are perfect for swimming in. Just make sure you conceal the string by slightly folding it in on itself.

Tampons are great for wearing at night. Just make sure you insert a fresh tampon before going to sleep and replace it first thing in the morning.

Never use more than one tampon at a time.

No. The term ‘naked’ refers to the fact that the tampons are untreated and untainted by any nasty chemicals. Just 100% certified natural organic cotton. The tampons come wrapped in a recyclable PP5 polypropylene film wrap. Around 13% of households have kerbside film collections and all major supermarkets have ‘front of store’ recycling collection points.

Preserving the planet’s resources is at the heart of our business. We recognise that cotton (of the non-organic) type has got itself a bad reputation as a dirty crop, which is why we’re only using organic cotton grown & certified to the Global Organic Textile Standards, the gold standard for the sustainable processing of products made from organically grown fibres. Our 100% organic cotton is grown without the use of fertilisers, herbicides and pesticides.

The Global Organic Textile Standard (GOTS) is the worldwide leading standard for organic textiles like cotton. GOTS certification ensures our cotton is pure and ethically sourced and is made without chemical pesticides, forced labour, child labour, or unfair wages.

Chlorine bleaching creates a by-product called dioxin. This poses serious problems for the environment and for womens health. Dioxin is a known carcinogen and leaves detectable residuals in products bleached with any type of chlorine bleach. In sanitary and personal care products, this type of bleaching unnecessarily exposes women to low levels of dioxins every time they use these products. Furthermore, dioxin settles in the fat cells of humans and wildlife, and stays there forever, building up cumulatively over time from birth. Given the number of tampons potentially used in a lifetime, increased exposure to dioxin means increased risk.

Unlike conventional feminine hygiene products, &SISTERS is Totally Chlorine Free. We use an oxygen bleaching process from hydrogen peroxide. This is the safest process for the environment as it does not release toxins into the environment. Using a water and oxygen process to destroy any bacteria in our organic cotton or pulp, results in a pure white material ready to make tampons, pads and panty liners.

Look out for “Chlorine Free” bleaching too, some methods include chlorine dioxide. Totally Chlorine Free is a certified method to avoid toxic chemicals and by-products.

Yes! All &SISTERS organic cotton period products are compostable and biodegradable.

&SISTERS period products are plastic free unlike conventional pads, tampons and panty liners which are often made from up to 90% crude oil plastics.

Every woman can use up to 17,000 period products during her lifetime, so avoiding sending these to landfill drastically improves your carbon footprint and goes towards helping save the planet.

Composting organic cotton pads and tampons is really easy!

  1. Create the correct conditions (i.e. damp and warm) by making a well-sealed compost bin and adding to it regularly. Using a properly enclosed bin is also really important to avoid attracting vermin.
  2. Ensure your compost has a good balance of green and brown compost
    • Green compost includes veggie peelings and grass cuttings etc. – softer, damper stuff that breaks down relatively quickly.
    • Brown compost involves fibrous things like cardboard and pruning clippings, as well as organic cotton tampons, pads and liners which will take longer to biodegrade than ‘green’ compost.
  3. To speed up the composting process, it’s a good idea to break up the pads and liners by hand (or with scissors) before putting them in the compost bin. Ideally, separate the backing layer which holds a small amount of adhesive – this can be composted too.
  4. Pat yourself on the back for choosing period products that won’t contribute to landfill.

Be patient. It takes 2+ years for period products to break down completely and return all the building blocks of nature back into the soil to continue the cycle for future plant growth.

The absorbent part of most period pads is made from wood pulp, also known as viscose. Wood pulp is obtained from trees and is used in more products than we could name. Wood pulp is not inherently toxic or polluting, however it is becoming responsible for mass deforestation around the world. Much of the viscose on the market today is manufactured cheaply with processes that are highly intensive when it comes to energy, water and chemicals. This has a devastating impact on workers, local communities and the environment.


Gynaecologists say that 100% organic cotton pads (such as those sold by &SISTERS) are more hygienic and comfortable to use than any other material. Cotton is hypoallergenic, more absorbent and a lot softer than wood pulp. Wood pulp can in many instances act as an irritant. 


We love bamboo and looked into producing pads made entirely of bamboo but unfortunately the absorbency just wasn’t there. To counter this, manufacturers of ‘bamboo’ pads actually use wood pulp to provide the absorbency that natural bamboo fibres lack, hence we decided not to pursue this route. However, as eco-technology improves, things may change so never say never. Maybe a truly eco bamboo pad will come along in the future and if it does we’ll be the first to let you know! 


We believe that the feminine care industry is an industry in the dark ages. The average woman uses over 10,000 tampons in a lifetime but manufacturers of intimate feminine hygiene products such as tampons are not required to disclose their ingredients. They also do not conduct testing to determine their products’ long-term effects on women’s bodies. That means that the majority of tampons today contain potentially harmful synthetic materials, pesticide residues commonly used to grow non-organic cotton, and toxic chemicals such as dioxin, which is a by-product of the tampon bleaching process that frequently uses chlorine. These ingredients have all been linked to cancers, infertility, and other reproductive illnesses such as polycystic ovary syndrome (PCOS) and endometriosis

The simple answer is that no tampon should be flushed down the toilet, although apparently half of women do.

Our 100% cotton tampons do biodegrade but they take a while and so don’t disperse instantly as toilet paper does. As our tampons are made from natural cotton ie they are plant based, they are suitable for composting and do biodegrade in septic tanks.

As the journey from our toilet to the sewage works is relatively quick there are often tight bends and narrow areas to get around, only pee, poo and toilet paper should be disposed of down the loo.

Of course, if our cotton tampons were to be disposed of at sea, then they will break down and disperse and so won’t be harmful to marine or bird life, unlike conventional tampons with plastic veils.

TSS is a rare but serious disease that can be fatal. It is caused by toxins produced

by the bacteria Staphylococcus aureus. Symptoms of TSS often mimic flu &

can include a sudden high fever (usually over 39°C), vomiting, diarrhoea, muscle aches, a sun burn like rash, sore throat, dizziness &/or fainting.

It may be that not all symptoms are present, only a few. If you believe that you have

one of more of the symptoms of TSS then immediately remove your tampon & contact your doctor, informing them that you have been using tampons.

TSS can occur during your period or some days after & although TSS can have fatal consequences it can be easily treated at an early stage. It is therefore important to consult a doctor as soon as possible.

You can reduce the risk of TSS by using tampons with the lowest absorbency necessary, by changing your tampon regularly & by alternating with pads, liners or a menstrual cup instead of tampons.


We aim to send out all orders received before 5pm on the next business day via Royal Mail Second Class mail.

Longer despatch times may occur over the weekend and holidays. Deliveries typically arrive within a week of placing your order.

You will receive a shipping confirmation and tracking number to the email associated with your order and/or subscription when your product has shipped.

Have more questions? Message us.

To update your shipping address follow the steps below:


-Log in with your credentials

-Your subscription details will pop up and you will see a section on the left called “ADDRESSES”. If you click on this section you will see both your current billing and shipping addresses.

-Select “Edit” to the left of your current shipping address

-Make the desired updates and select “Save”

Have more questions? Message us.

You can also check your upcoming delivery directly through your account.


-Log in with your credentials

-Select “Subscriptions” to the left of the screen

-You’ll see your upcoming deliveries listed here. You can also come here if you ever need to skip an upcoming delivery.

Have more questions? Message us.

Find our contact details here and our T&C’s here.

We are so sorry to hear your box arrived empty or damaged! While we have little control over what happens to our shipments after they leave us, we put great trust in our shipping carrier to ensure a successful delivery. We are disappointed to hear this was not the case for you and will notify our shipping partners to ensure that they take note of this issue.

We are of course happy to send you another box ASAP.

Have more questions? Message us.

Yes. You can have any item in our shop sent to you in Europe or internationally.

Unfortunately, at this moment we can only ship customised and subscription packs within the UK and Europe.

Have more questions? Message us.

Find our contact details here and our T&C’s here.

We primarily use Royal Mail, however from time to time we might also use myHermes or DPD for larger shop orders. Find our contact details here and our T&Cs here.

Have more questions? Message us.

Find our contact details here and our T&C’s here.