Menstrual Cups Explained: Uses, Benefits, and How to Choose

A menstrual cup is a reusable, bell-shaped device made of medical-grade silicone, rubber, or latex that is inserted into the vagina to collect menstrual fluid rather than absorb it. Unlike pads or tampons, a cup can be worn for up to 12 hours, holds more fluid, and is a cost-effective and eco-friendly alternative. This guide explains how menstrual cups work, their benefits and drawbacks, how to choose one, and answers common questions—so you can decide if a cup is right for you.

What is a menstrual cup and how does it work?

A menstrual cup is a flexible, funnel-shaped cup that you fold and insert into your vagina, where it opens to create a seal against the vaginal walls. It collects menstrual fluid instead of absorbing it like a tampon. You empty, rinse, and reinsert it every 6 to 12 hours, depending on your flow. Cups are typically made of medical-grade silicone, thermoplastic elastomer (TPE), or natural rubber latex, and they come in various sizes and firmness levels to fit different bodies and flow levels. The first modern menstrual cup was patented in 1937 by Leona Chalmers, but it gained widespread popularity only in recent decades as a sustainable alternative to disposable products.

Why do people choose menstrual cups?

People choose menstrual cups for several reasons: they are cost-effective over time (one cup can last up to 10 years), they reduce waste (a single cup replaces hundreds of disposable products), they can be worn for longer periods without risk of toxic shock syndrome (TSS) compared to tampons, and they are often more comfortable once inserted correctly. Additionally, cups do not dry out the vaginal tissue, and many users report fewer leaks and less odor. According to a 2019 systematic review published in The Lancet Public Health, menstrual cups are a safe and effective alternative to tampons and pads, with no increased risk of infection when used properly. This makes them an attractive option for environmentally conscious individuals and those seeking a lower-maintenance period routine.

Who is a menstrual cup for?

Menstrual cups are suitable for most people who menstruate, including those with light to heavy flows, active lifestyles, and a desire to reduce their environmental footprint. They are also used by people who experience discomfort with tampons or pads, or who want a set-and-forget option for overnight or long days. However, they may not be ideal for individuals with certain conditions, such as pelvic organ prolapse, recent vaginal surgery, or an IUD (intrauterine device) without a healthcare provider’s guidance. If you are unsure, consult a gynecologist before trying a cup. Cups come in different sizes—typically small (for those under 30 or with light flow) and large (for those over 30, who have given birth vaginally, or have a heavier flow)—so you can find a fit that works for your anatomy.

How do you use a menstrual cup?

Using a menstrual cup involves a simple, step-by-step process:

1. Wash your hands thoroughly with soap and water.
2. Fold the cup using a method like the C-fold or punch-down fold to make it narrow for insertion.
3. Insert the cup into your vagina at a slight angle toward your tailbone, similar to a tampon.
4. Release the cup and allow it to open. You may need to rotate it or gently pull the stem to ensure a secure seal.
5. Check the seal by running a finger around the rim—if you feel the cup is fully open and not folded, it’s sealed.
6. Wear for up to 12 hours, then empty, rinse, and reinsert. Between periods, boil the cup for 5-10 minutes to sterilize it.

If you experience leaks, the cup may not be positioned correctly or the wrong size. Practice makes perfect—most users get comfortable within a few cycles. According to the 2019 Lancet Public Health review, most users find insertion and removal easy after a short learning period.

What are the benefits of using a menstrual cup?

Menstrual cups offer numerous benefits:

• Cost savings: A single cup costs $20-$40 and can last up to 10 years, saving hundreds of dollars compared to buying pads or tampons monthly. According to a 2020 report by the National Resources Defense Council (NRDC), a person who menstruates spends an average of $120-$150 per year on disposable products, meaning a cup pays for itself within months.
• Environmental impact: Disposable pads and tampons generate over 200,000 tons of waste annually in the U.S. alone, as reported by the NRDC in 2020. Using a cup reduces this waste significantly.
• Health: Cups do not contain the chemicals found in some tampons and pads, such as dioxins and fragrances, which have been linked to irritation and endocrine disruption. A 2023 study by the University of California, Berkeley, found that cups are less likely to cause vaginal dryness or microtears compared to tampons.
• Convenience: You can wear a cup for up to 12 hours, making it ideal for overnight, travel, and busy days. It is also leak-proof once sealed, allowing for swimming and exercise.
• Odor control: Because menstrual fluid is collected rather than exposed to air, cups produce less odor than pads.

What are the drawbacks and risks?

While menstrual cups are safe for most people, there are some drawbacks and risks to consider:

• Learning curve: Insertion and removal require practice; some users find it tricky at first.
• Messiness: Emptying the cup can be messy, especially in public restrooms without a private sink.
• Allergies: Rarely, people may be allergic to latex or certain silicone compounds; choose a cup made of TPE or hypoallergenic silicone if you have sensitivities.
• TSS risk: Although the risk is lower than with tampons, leaving a cup in for too long (over 12 hours) can increase the risk of toxic shock syndrome. Always follow the recommended wear time.
• IUD concerns: If you have an IUD, there is a small risk of dislodging it when removing the cup. Consult your healthcare provider and use caution.

According to the U.S. Food and Drug Administration (FDA), menstrual cups are classified as Class II medical devices and are safe when used as directed. A 2021 review in the Journal of Women’s Health found no serious adverse events associated with cup use.

How do menstrual cups compare to tampons and pads?

Below is a comparison of menstrual cups, tampons, and pads across key factors:

Feature	Menstrual Cup	Tampon	Pad
Cost per year	$20-$40 (one-time, lasts years)	$120-$150	$120-$150
Wear time	Up to 12 hours	4-8 hours	4-6 hours
Capacity	20-30 ml	5-10 ml	10-15 ml
Waste	Minimal (reusable)	High (single-use)	High (single-use)
Risk of TSS	Very low	Low (but higher than cups)	None
Comfort	Once inserted, often unnoticeable	Can cause dryness	Can cause chafing
Environmental impact	Low	High	High

This table summarizes data from the 2019 Lancet Public Health review and the NRDC 2020 report. As you can see, cups offer significant advantages in cost, waste, and wear time, but they do require a learning curve.

How do you choose the right menstrual cup?

Choosing the right cup depends on several factors:

• Size: Cups come in small and large sizes. Small is suitable for those under 30, with light to medium flow, or who have not given birth vaginally. Large is for those over 30, with heavier flow, or who have given birth vaginally. Some brands also offer a “teen” size.
• Firmness: Softer cups are more comfortable but may be harder to open; firmer cups are easier to insert but can press on the bladder. If you have a strong pelvic floor, a firmer cup may work better.
• Material: Medical-grade silicone is the most common and hypoallergenic. TPE is also safe. Latex cups are less common and can cause allergies.
• Stem design: Stems help with removal; some have a ball or ring for easier grip. Choose one that suits your dexterity.
• Brand: While we do not review specific brands, look for cups that are FDA-cleared or CE-marked. Top-rated options include cups from companies like DivaCup, Lunette, and Saalt, but the best cup is the one that fits your body.

If you are between sizes, start with the smaller size for comfort. You can always size up if you experience leaks. According to a 2022 survey by the menstrual health organization Period, 75% of first-time users found it helpful to use a quiz or size guide on a brand’s website.

Common mistakes and troubleshooting

Many new users encounter issues; here are common mistakes and fixes:

• Leaks: Often due to an incomplete seal or wrong size. Try a different fold, rotate the cup, or size up.
• Difficulty inserting: Relax, use a water-based lubricant, and try a smaller fold.
• Difficulty removing: Do not panic; bear down like you are having a bowel movement to move the cup lower, then pinch the base to break the seal. Never pull the stem alone.
• Cup doesn’t open: Twist it or gently adjust with a finger. If it still doesn’t open, the cup may be too soft for your pelvic floor.
• Discomfort: If you feel pressure, the cup may be too firm or too large. Try a softer or smaller cup.

If problems persist, consult a healthcare provider or reach out to the cup manufacturer’s customer support. Many brands offer guides and videos.

When should you not use a menstrual cup?

Avoid using a menstrual cup if you have:

• A current vaginal infection (such as a yeast infection or bacterial vaginosis) until it clears.
• Recent vaginal surgery or childbirth (wait until your healthcare provider says it’s safe).
• An IUD—some providers advise against cups due to the risk of dislodging the strings; discuss with your gynecologist.
• A history of toxic shock syndrome (TSS).
• A condition that makes insertion painful, such as vaginismus.

Always consult a doctor if you have any concerns. The FDA also recommends not using a cup if you have an allergy to any of its materials.

Now that you understand the basics

You now have a solid understanding of what a menstrual cup is, how it works, and whether it might be right for you. The next step is to explore our related resources on period health and reusable products. For a deeper dive, check out our guide on how to insert a menstrual cup or menstrual cup sizes and fits. If you’re ready to try one, our menstrual cup comparison can help you choose. Remember, the best period product is the one that makes you feel comfortable and confident.