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How to buy the best menstrual cup for you

Cost-effective and environmentally friendly too – here's what you need to know about menstrual cups.

menstrual cups pads tampons

What on earth is a moon cup?

A recent Roy Morgan survey found almost 5.4 million Australians buy tampons, pads or panty liners in an average month. But there's an alternative that's starting to grow in popularity that could save money and help the environment too.

Menstruation, menstrual or 'moon' cups are reusable, bell-shaped devices made of silicon or rubber which are worn internally. They sit low in the vaginal canal and collect, rather than absorb, the menstrual flow. And while they've actually been around since the 1930s – just like tampons – they aren't widely known or advertised in Australia.

But this is starting to change, as more women discover the advantages of using a menstrual cup for economic, environmental and convenience reasons.

In this report, we cover:

How do menstrual cups work?

Menstrual cups are made of soft, flexible material; to insert one, you fold it up to make it smaller, and then reposition it inside the vagina so it opens up (specific instructions vary between manufacturers). A cup can be worn for up to 12 hours, including overnight; it must then be emptied and washed with soap, and can then be reinserted. 

A study conducted by the Vancouver Island Women's Clinic in Canada in 2011 found that women who typically used tampons but switched to menstrual cups for three months reported higher satisfaction with their period product than those who continued to use tampons, particularly in regards to convenience and leakage. And 91% of the participants said they would continue to use the cup and would recommend it to others.

A better environmental choice?

An average women uses at least one box of tampons or pack of pads during her period, which adds up to around 11,000 to 16,000 pads or tampons in a lifetime. 

Production and disposal of tampons and pads can cause multiple environmental issues. In addition to contributing to landfill, concerns have been raised regarding the pesticides used to grow cotton, which can pollute waterways and have harmful effects on aquatic wildlife. 

Raw materials

When it comes to menstrual cups it's very clear what the cup is made of – usually medical grade silicone or latex. But what materials make up a tampon or pad? You generally won't find this info on the packaging – or anywhere else. In Australia, unless you're a manufacturer, there's no way of knowing exactly what's in tampons or pads.

Why is this? In Australia, tampons are classified as "medical devices", while pads are not regulated at all. As a result, companies are not legally required to list their ingredients once they get approval from the Therapeutic Goods Administration (TGA). So, if you're concerned about what you're putting in (or very close to) your body, a menstrual cup may be the better choice.

Buying the right menstrual cup

Every body is unique and therefore a general recommendation for one menstrual cup is impossible. It might take one or two tries to find the right cup as there are some differences between different brands. Here are some points to consider if you decide to buy one:

  • Material: Silicone (medical or non-medical grade), TPE (rubber and plastic) or latex. Other additives are used to adjust the colour. 
  • Firmness: The cups can be firm, medium or soft. Larger cups are usually a bit more firm than the small ones. The firmer they are, the easier they pop open, but it may be harder to insert them. Also, if you have a very sensitive bladder, you may want a softer cup.
  • Capacity: They can hold up to 20–30ml. You should choose the capacity according to the heaviness of your period.
  • Size: The overall length and diameter of both the cup and stem. There are also usually two sizes: one for women who are under 30 and have not given birth vaginally, and one for women who are 30 and over or who have given birth vaginally, regardless of age. The length depends on how high or low your cervix sits during your period. Ask your GP for help and look at our table for measurements.
  • Cup shape: Some are long and narrow, while others are more rounded. The rims can also vary in thickness and shape. Which one is more comfortable depends on your personal preference.
  • Stem design: The stem can be rounded, flat, triangular, hollow, solid, and with or without grips. Most can be cut shorter to adjust to your needs.
  • Air holes: Number and placement of air holes vary, depending on the brand. They are helpful in the insertion and removal of the cup, but have no other function. The LilyCup, for example, doesn't need air holes due to its design.
  • Quality and safety: Since 2018, menstrual cups are no longer required to be registered with the TGA before selling in Australia.

Cups available in Australia*

Another tricky part of buying a menstrual cup is finding out where to get one. The Keeper, DivaCup, Juju and Lunette are available from Australian retailers (a list of retailers can be found on the brands' websites). 

We've sourced some retailers and linked them to the name of each cup (read our information about shopping links). Stock may be limited, so it might be easier to buy online.

Brand Size Capacity to the rim Total length Body length Stem length Rim Diameter Stem type Material Colours County of Orign
Juju 1 Small 20ml 65mm 46mm 19mm 40mm Long thin Medical-grade silicon Clear Australia
Juju 2 Medium/Big 30ml 69mm 50mm 19mm 46mm Long thin Medical-grade silicon Clear Australia
Ruby Cup S Small 24ml 65mm 46mm 19mm 40mm Hollow tube Medical-grade silicon Clear, Blue, Pink, Purple Denmark
Ruby Cup M Medium/Big 34ml 68mm 51mm 17mm 45mm Hollow tube Medical-grade silicon Clear, Blue, Pink, Purple Denmark
The Diva Cup 1 Small 30ml 70mm 57mm 13mm 43mm Hollow tube Medical-grade silicon Clear Canada
The Diva Cup 2 Medium/Big 30ml 70mm 57mm 13mm 46mm Hollow tube Medical-grade silicon Clear Canada
MoonCup B Small 28.8ml 71mm 50mm 21mm 43mm Hollow tube Medical-grade silicon Clear UK
MoonCup UK A Medium/Big 29.3ml 71mm 50mm 21mm 46mm Hollow tube Medical-grade silicon Clear UK
The Keeper B Small 30ml 79mm 54mm 25mm 45mm Hollow tube Natural gum rubber (Latex) Brown USA
The Keeper A Medium/Big 30ml 79mm 54mm 25mm 46mm Hollow tube Natural gum rubber (Latex) Brown USA
Lunette 1 Small (soft) 25ml
Flat tab Medical-grade silicon Clear, Blue, Yellow, Coral, Violet Finland
Lunette 2 Medium/Big (firm) 30ml
Flat tab Medical-grade silicon Clear, Blue, Yellow, Coral, Violet Finland
LilyCup A Small 28ml
Hollow tube Medical-grade silicon Pink Sweden
Lily Cup B Medium/Big 32ml
Hollow tube Medical-grade silicon Pink Sweden
Lily Cup Compact B Medium/Big 19ml^ 58mm 47.5mm 10.5mm 45mm Hollow tube Medical-grade silicon Pink Sweden

* Information is based on the manufacturers' websites, and and
 ^ Capacity up to the airholes.

Menstrual cups: pros and cons

The best way to figure out if a moon cup is the right thing for you is to try it. You might be surprised by how easy and convenient it is.

What are the advantages to a menstrual cup?

  • Easy to use: If you've used tampons (especially those without an applicator) or a diaphragm you should have little trouble learning how to insert a menstrual cup. The websites of the brands explain the process in detail.
  • Convenience: You've always got the cup handy at home, or it easily travels with you. Even if you replace it once a year, you can still save yourself eleven trips to the pharmacy or supermarket.
  • Cost saving: The cups are designed for long-term use (some women use them for up to ten years), which means significant cost savings over tampons or pads. One month of pads and tampons costs around $10, while the price of a moon cup varies between $40 and $55. It's a higher upfront price, but it's worth it after six months.
  • Environmental benefits: Fewer tampons or pads also means less waste clogging up our landfills and less cotton or paper use.
  • Odour: As the blood doesn't get exposed to air as it does with pads or tampons, there'll be less odour.
  • Health benefits: Moon cups leave your vaginal pH and bacterial balance in place – unlike tampons, which absorb your vaginal fluid.
  • Hypoallergenic: They are suitable for those with sensitive skin, dermatitis and latex allergies (except for latex cups, obviously).
  • Replacement: Tampons need changing every four to eight hours, but cups can stay in for up to twelve hours before emptying. This is especially useful for overnight.
  • Capacity: They can hold up to three times more fluid then tampons (about 20–30ml).
  • Comfortable: Once you've found a brand that's the right fit for you, you shouldn't notice it's there. You can also wear one when anticipating your period, whereas wearing tampons when you don't have your period is not recommended, and  you risk toxic shock syndrome (TSS) and dryness.
  • Action-friendly: No strings, no wings and no leaks. Perfect for those with an active lifestyle, who enjoy sports such as running, swimming and yoga.

What are the disadvantages to a menstrual cup?

  • Mess: Emptying the cup can be messy in the beginning, though most users get the hang of it. Some suggest changing it in the shower once every 12 hours. Cleaning it in a public bathroom could cause some embarrassment.
  • Fitting: Not every cup is the same; some are longer or shorter. You may need to trial one or two brands to find the right fit. Also, individual anatomy can make it difficult to put the cup in the right place (for example, if you have a dropped uterus).
  • Insertion: For younger girls and those who've never had penetrative sex, it can be difficult to insert a cup.
  • Removal: It takes some people longer to learn than others. You should never pull on the stem; instead pinch the base and pull. Be careful if you have an IUD, as using a cup could pull the strings and dislocate it. Ask your GP for more information.
  • Maintenance: You should sterilise the cup after each cycle, following the manufacturer's directions. This usually involves using boiling water or special sterilising solution.

Shopping links on the CHOICE website

CHOICE is an independent, non-profit organisation dedicated to helping consumers. Clicking a link will take you to a retailer's website to shop. While we make money if you buy through some retailer links, this doesn't influence any of our rankings. 100% of the money we make goes straight back into our non profit mission. We're currently testing this service and will consider providing more shopping links in the future. Tell us what you think.

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