Choosing between a menstrual cup and menstrual disc comes down to how each product fits your anatomy, flow, comfort preferences and lifestyle. Menstrual cups sit inside the vaginal canal and collect flow in a cup-shaped reservoir, while menstrual discs sit higher in the vagina and collect flow in a shallow reservoir near the cervix.
Neither option is automatically better for everyone. The right choice depends on what feels comfortable, how your cervix sits, how much you bleed, how you prefer to insert and remove your period product, and whether you want the option of wearing it during penetrative vaginal sex.
At a glance
- Menstrual cups sit inside the vaginal canal and use the cup body and a seal with the vaginal walls to collect menstrual flow.
- Menstrual discs sit higher in the vagina, with the rim positioned behind the cervix and behind the pubic bone.
- Cups and discs come in different sizes, shapes, firmnesses and capacities, so comparing individual models matters.
- A disc may be worth considering if you prefer a higher, flatter fit or want a product designed for penetrative vaginal sex.
- A cup may appeal if you prefer a familiar cup-shaped design, a range of firmness options or a product that sits lower in the vaginal canal.
- Leakage can happen with either product. Correct sizing, positioning and technique matter.
- If you have an IUD, the evidence around menstrual cup use and IUD expulsion deserves particular care. See the IUD section below.
Table of contents
- What is the difference between a menstrual cup and disc?
- Menstrual cup vs disc comparison
- How menstrual cups work
- How menstrual discs work
- Fit, cervix position and anatomy
- Capacity and heavy flow
- Insertion and removal
- Period sex, exercise, swimming and sleep
- Menstrual cups and discs with an IUD
- Are menstrual cups and discs safe?
- How to choose
- Frequently asked questions
What is the difference between a menstrual cup and disc?
The biggest difference is where and how the product sits inside the body.
A menstrual cup is folded and inserted into the vagina, where it opens and collects menstrual flow. Depending on the design and your anatomy, it may sit relatively low or higher in the vaginal canal.
A menstrual disc is folded into a narrow shape and inserted deeper into the vagina. The back of the rim sits in the vaginal fornix behind the cervix, while the front of the rim is tucked behind the pubic bone.
Neither product absorbs menstrual blood. They collect it instead.
Menstrual cup vs disc comparison
| Feature | Menstrual cup | Menstrual disc |
|---|---|---|
| Main design | Cup-shaped reservoir | Flat, shallow reservoir with a flexible rim |
| Position | Inside the vaginal canal, usually below the cervix | Higher in the vagina, with the rim positioned around the cervix |
| How it stays in place | Cup body and seal with vaginal walls | Rim sits behind the cervix and behind the pubic bone |
| Suction | Creates a seal with the vaginal walls | Does not rely on suction |
| Reusable options | Yes | Yes, plus some disposable options |
| Firmness | Varies considerably between models | Rim firmness and bowl flexibility vary by model |
| Capacity | Varies by model | Varies by model |
| Period sex | Generally not designed for penetrative vaginal sex | Some discs are specifically designed for penetrative vaginal sex |
| Wear time | Follow manufacturer instructions; Australian TGA requirements specify no more than 12 hours | Follow the specific manufacturer's instructions |
| Cleaning | Wash between uses and follow manufacturer care instructions | Wash between uses and follow manufacturer care instructions |
The TGA's Australian requirements specify a maximum duration of use of no more than 12 hours for menstrual cups. This should not be presented as a universal TGA wear-time recommendation for menstrual discs. For discs, follow the instructions supplied with the specific product.
How menstrual cups work
Menstrual cups are flexible containers that collect menstrual flow rather than absorbing it.
You fold the cup before insertion. Once inside the vagina, it opens and forms a seal with the vaginal walls. The cup is then removed, emptied, cleaned and reinserted according to the manufacturer's instructions.
Cups are available in different lengths, diameters, capacities and firmnesses. These differences can have a bigger impact on comfort than the product's brand name alone.
For example, a cup that is too long may feel uncomfortable if your cervix sits lower, while a cup that is too short may be harder to reach if your cervix sits higher.
You can compare cup dimensions and features in the Menstrual Cups Comparison Chart.
How menstrual discs work
Menstrual discs have a flatter profile than cups and are designed to sit higher in the vagina.
To insert one, you compress the rim and guide it backwards into the vagina. The back of the rim sits behind the cervix and the front of the rim is tucked behind the pubic bone.
Unlike a cup, a disc does not rely on a suction seal to stay in place.
Disc designs vary. Some have finger tabs, loops, tails or other removal features, while others have a simple rim.
The best way to understand the differences between individual models is to compare their dimensions, rim firmness, capacity and removal features.
See the Menstrual Disc Comparison Chart.
Fit, cervix position and anatomy
Your anatomy is one of the most useful starting points when choosing an internal period product.
Your cervix can sit at different heights and may also change position during your cycle. Some people have a relatively low cervix, while others have a higher cervix.
A menstrual cup needs to sit below the cervix so it can collect menstrual flow. A disc is designed to sit higher, with its rim positioned around the cervix and tucked behind the pubic bone.
This means a product that works well for one person may feel uncomfortable or leak for another.
If you are unsure about your cervix position, learning how to check it can help narrow down your options.
Rather than choosing based only on age, whether you have given birth or a generic size label such as “small” or “large”, compare the actual dimensions of the product and consider your anatomy, flow and comfort preferences.
For more help, see Cervical Positions: How to Find Out if You Have a High or Low Cervix.
What about a tilted or retroverted uterus?
A tilted or retroverted uterus does not automatically mean that you cannot use a cup or disc.
However, the position and direction of your cervix can affect how an internal product needs to be positioned. Some people may find a disc easier to position, while others may prefer a cup.
This is an area where individual anatomy matters more than a blanket product recommendation. For more information, see our guide to tilted uterus, including types, causes and treatments.
If you have significant pelvic symptoms, pelvic organ prolapse or another gynaecological condition, consider discussing your options with an appropriate healthcare professional.
Capacity and heavy flow
Both cups and discs are available in different capacities.
It is tempting to assume that discs always hold more than cups, but capacity varies substantially between individual products. A larger-looking disc does not necessarily translate into a larger usable capacity once the product is positioned inside the body.
If you have a heavy flow, start by comparing the actual stated capacity of individual products and consider how often you are comfortable emptying the product.
A higher-capacity product can be useful, but comfort and fit still matter. Choosing a product that is uncomfortable simply because it has a larger capacity may create other problems.
For more options, see Menstrual Cups Comparison Chart and Menstrual Disc Comparison Chart.
Insertion and removal
Cups and discs have different insertion and removal techniques.
Inserting a menstrual cup
A cup is usually folded before insertion. Common folds include the C-fold and punch-down fold.
Once inside the vagina, the cup needs to open properly. Running a clean finger around the outside can help you check that it has opened rather than remaining folded or dented.
Inserting a menstrual disc
A disc is compressed at the rim and inserted deeper into the vagina. The back of the rim needs to sit behind the cervix, while the front is tucked behind the pubic bone.
Correct positioning is important. If the disc is sitting beside the cervix rather than around it, leakage can occur.
Removing a menstrual cup
Do not pull a cup out by the stem alone.
Instead, reach the base of the cup and gently squeeze it to release the seal before slowly removing it.
Breaking the seal before removal is particularly important if you use an IUD.
Removing a menstrual disc
A disc does not have the same suction seal as a cup. Removal usually involves hooking a finger under the front rim or using the product's removal feature if it has one.
Disc removal can be messier than cup removal because the flexible reservoir can move or spill as it is taken out. Removing it over the toilet or in the shower can make this easier while you are learning.
For step-by-step instructions, see How to Use a Menstrual Cup and How to Use a Menstrual Disc.
Period sex, exercise, swimming and sleep
Period sex
Menstrual cups are generally not designed to be worn during penetrative vaginal sex.
Some menstrual discs, however, are specifically designed to be worn during penetrative vaginal sex. Always check the manufacturer's instructions for the individual disc.
A menstrual disc does not provide contraception or protection against sexually transmitted infections.
See Period Sex Tips: How to Have Mess-Free Sex During Your Period for more information.
Exercise and swimming
Both cups and discs can be used during many physical activities, including swimming and exercise, provided the individual product is correctly fitted and used according to its instructions.
If you experience pressure, discomfort or repeated leakage during movement, your product may not be the right size, shape or firmness for you.
Sleeping
Whether you can sleep with a cup or disc depends on the individual product's instructions and maximum wear time.
For cups in Australia, the TGA requires supplied instructions to specify a maximum duration of use of no more than 12 hours.
For discs, follow the manufacturer's stated wear time rather than assuming that every disc has the same maximum duration.
Menstrual cups and discs with an IUD
Research into menstrual cups and IUD expulsion is still developing.
A 2023 systematic review found the specific evidence was scarce, with studies disagreeing on whether cup use is linked to higher expulsion rates. A larger 2024 analysis of a copper-IUD trial found higher odds of expulsion associated with menstrual cup use for one particular IUD design, as well as a higher rate of accidental self-removal regardless of IUD type. The pattern was significant enough that the trial investigators began advising participants against using a menstrual cup alongside their IUD partway through the study. [Source: Bowman & Thwaites 2023; Brown et al. 2024]
It is not yet clear whether these findings apply equally to every IUD type used in Australia.
This does not mean that cups and IUDs can never be used together. It does mean the combination deserves a specific conversation with whoever fitted your IUD, including which IUD type you have, rather than a general assumption that any cup and any IUD are compatible.
If you use a menstrual cup with an IUD, do not pull the cup out without first breaking its seal.
Evidence about menstrual discs and IUDs is much more limited, so avoid assuming that findings about cups automatically apply to discs.
For more information, see Can You Use a Menstrual Cup or Disc with an IUD?.
Are menstrual cups and discs safe?
Menstrual cups have been studied more extensively than menstrual discs.
A 2019 systematic review of 43 studies involving 3,319 participants concluded that menstrual cups can be a safe option for menstrual hygiene, although it also highlighted the limited quality of much of the available evidence. Only three of the studies included in its qualitative or quantitative syntheses were considered moderate-to-high quality.
A 2026 systematic review and meta-analysis included 11 studies and 10,268 participants. In two randomised studies conducted in Kenya, menstrual cup users had a lower risk of STIs than non-cup users. When randomised and observational studies were combined, menstrual cup use was also associated with a lower prevalence of bacterial vaginosis. However, only three of the eleven studies were rated good quality, and the strongest STI findings came from Kenyan trials involving adolescents and young adults. These findings therefore should not be interpreted as proof that menstrual cups protect every person against infection.
The overall evidence is reassuring, but it is not a guarantee that complications cannot occur.
As with any internal menstrual product, follow the manufacturer's instructions for insertion, cleaning, wear time and storage. Wash your hands before handling the product and stop using it and seek appropriate medical care if you develop concerning symptoms.
For more information, see Are Menstrual Cups Safe? What the Science Says.
Toxic Shock Syndrome
Toxic Shock Syndrome (TSS) is rare but serious.
Australian TGA requirements for menstrual cups include a TSS warning and require product information to state that menstrual cups are not supplied sterile and to provide hygiene and care instructions. They also require a maximum duration of use of no more than 12 hours.
Always follow the instructions supplied with your individual product.
How to choose between a menstrual cup and disc
There is no single product that is right for every body.
A menstrual cup may suit you if:
- you prefer a cup-shaped design
- you like having different firmness options to choose from
- you prefer a product that sits within the vaginal canal
- you are happy to learn how to release the seal before removal
- you want to compare a wide range of cup sizes, lengths and capacities
A menstrual disc may suit you if:
- you prefer a higher, flatter internal fit
- you do not want a product that relies on suction
- you want the option of a product designed for penetrative vaginal sex
- you are comfortable learning a different insertion and removal technique
- you prefer to compare different rim designs and removal features
You do not have to commit to one forever.
Some people use a cup for some cycles or activities and a disc for others. You can also change products if your anatomy, flow, comfort or preferences change.
The most useful starting point is usually not “Which product is best?” but:
Which product's shape, dimensions, positioning and features are most likely to work for my body and the way I live?
For a broader comparison, visit the Menstrual Products Comparison Hub.
Frequently asked questions
Can I switch between a menstrual cup and disc during my period?
Yes. You can use different products at different times, provided each product is cleaned, stored and used according to its manufacturer's instructions.
Which is better for a low cervix: a cup or disc?
There is no universal answer. A shorter cup may work well for some people with a low cervix, while others may prefer the higher position of a disc. Compare product dimensions and consider how your cervix sits rather than relying on a generic “low cervix” label.
Can I sleep with a menstrual cup or disc?
This depends on the product's instructions and maximum wear time. For menstrual cups, Australian TGA requirements specify a maximum duration of use of no more than 12 hours. For discs, follow the manufacturer's instructions.
Can I have penetrative sex with a menstrual disc?
Some menstrual discs are specifically designed to be worn during penetrative vaginal sex. Check the manufacturer's instructions for the individual disc. Menstrual cups are generally not designed for penetrative vaginal sex.
Can I use a menstrual cup or disc with an IUD?
This deserves individual consideration. Research into cup use and IUD expulsion is limited and mixed, but a 2024 analysis found higher odds of expulsion associated with cup use for one particular copper-IUD design. If you have an IUD, discuss the combination with the healthcare professional who fitted it and check the instructions for your menstrual product.
For more information, see Can You Use a Menstrual Cup or Disc with an IUD?.
What if my cup or disc keeps leaking?
Repeated leakage does not necessarily mean that you need a higher-capacity product. Check whether the product is opening and positioned correctly, whether the size and shape suit your anatomy, and whether you are emptying it often enough for your flow.
If you continue to have problems, comparing a different size, shape or product type may help.
Final thoughts
Menstrual cups and discs do the same basic job, but they feel and function differently.
A cup sits within the vaginal canal and uses a seal to collect flow. A disc sits higher, around the cervix, and stays in place with its rim behind the pubic bone.
The best choice is the one that fits your anatomy, flow, comfort preferences and lifestyle.
If you are unsure where to start, use the Menstrual Products Comparison Hub to compare cup and disc designs before choosing a specific product.