Low Waste Menstrual Products

TL;DR: Menstrual cups and discs eliminate 99%+ of period waste and cost less than $2/year after the initial purchase. Best beginner cup: medium firmness with good removal grip. Best for high cervix: longer stem or ball-stem design. Best for sex during period: menstrual disc. Skip disposable “organic” cotton tampons — better for your body but still generates packaging waste every cycle.

Low Waste Menstrual Products: Complete Buyer’s Guide to Cups, Discs, and Period Underwear

The average person menstruating uses 11,000–16,000 disposable pads or tampons in their lifetime — nearly all of which go to landfill, since applicators and wrappers are non-recyclable mixed materials and used products are biohazardous. Low waste menstrual products — cups, discs, and period underwear — address this entirely. A single menstrual cup replaces roughly 2,400 tampons over 10 years of use. This guide covers every format, how to choose correctly the first time, and what the actual performance differences are.

Top Picks at a Glance

Why the Switch Is Worth Making

The waste case is unambiguous. But low waste menstrual products also have health and cost arguments that stand independently:

• Cost: a menstrual cup costs $20–$45. Replacing 2,400 tampons at $0.25–$0.40 each is $600–$960 over 10 years. The cup pays for itself in 2–4 cycles.
• Capacity: cups hold 3–5x more fluid than a super tampon (25–30ml vs. 6–9ml). For heavy flow users, this means fewer changes — a cup can safely remain for up to 12 hours vs. 4–6 hours for a tampon.
• TSS risk: medical-grade silicone cups don’t absorb fluid — they collect it. Toxic Shock Syndrome risk is associated with super-absorbent synthetic fibers creating bacterial growth conditions, not with silicone collection. Cup-related TSS cases are extremely rare in published literature.
• Comfort: properly sized and positioned cups are not felt during use. The tampon string irritation, dryness from over-absorbent tampons on lighter days, and pad chafing are all eliminated.

This fits the same philosophy as switching to reusables across the whole household — see our zero waste bathroom essentials guide for the complete picture.

Menstrual Cups — How to Choose

Cervix Height: The First Measurement

Cervix height — measured by inserting a clean finger during menstruation and noting where you feel the cervix — determines which cup length will sit correctly:

• Low cervix (can reach cervix at first knuckle or less): needs a short cup — 40–45mm body length. Using a long cup means the stem protrudes uncomfortably. Look for: Super Jennie Small, Merula Cup (spherical design works for all cervix heights).
• Medium cervix (reach cervix at mid-finger): most cups fit well. This is the standard sizing range most manufacturers design for.
• High cervix (can barely reach or can’t reach cervix): needs a longer cup or one with a long stem that’s easy to reach. Look for: Lily Cup (tapered body designed for high cervix), Saalt Soft, or cups with ring/ball stems that are easier to grip without the cup being fully in reach.

Firmness: Comfort vs. Suction Seal

Cup firmness is measured roughly on a 1–10 scale across the industry, though not standardized. It’s the most common variable causing initial leaking or discomfort:

• Firm cups: pop open reliably after insertion, maintain suction seal against active bladder pressure. Better for: high-activity use (running, cycling), strong pelvic floors, and anyone who had difficulty with leaking on softer cups. Risk: if pelvic floor is too tense, a firm cup presses against the urethra and causes the feeling of needing to urinate constantly.
• Soft cups: more comfortable for sensitive bladders, easier to remove without suction-break difficulties, and preferred post-surgery or with conditions like endometriosis, interstitial cystitis, or vaginismus. Risk: may not open fully after insertion if pelvic floor is strong — leading to leaking.
• Medium firmness: the correct starting point for most people. Adjust based on experience.

Size: Pre- and Post-Childbirth Guidelines Are Oversimplified

Most cups offer a “size 1” (smaller) and “size 2” (larger), marketed as pre- and post-childbirth respectively. This is a guideline, not a rule. Relevant variables: cervix height (as above), pelvic floor strength, and flow volume. A higher-flow person who has never been pregnant may be more comfortable in a larger size for capacity. A post-partum person with a high pelvic floor may still fit the smaller size comfortably. The guideline is a starting point — let your anatomy and experience guide sizing adjustments.

Menstrual Discs — Different Mechanism, Different Use Cases

Menstrual discs are fundamentally different from cups in how they sit and seal:

• Cups sit in the vaginal canal and create a suction seal against the vaginal walls.
• Discs sit at the base of the cervix (the fornix), held in place by the pubic bone rather than suction. No seal against vaginal walls.

This difference has practical implications:

Advantages of Discs

• Mess-free sex during menstruation: disc sits at the cervix and doesn’t obstruct the vaginal canal — the only menstrual product that allows penetrative sex without removal.
• Better for low cervix: disc placement is independent of cervix height in a way that cups are not.
• No suction removal: discs are removed by hooking a finger under the rim — no need to break suction, which some cup users find difficult.
• “Auto-dump” during toilet use: bearing down while seated on the toilet tips the disc forward and empties it — many disc users can empty and reinsert in a public restroom with less mess than cup emptying.

Disadvantages of Discs

• No suction seal means position-dependent leaking is more common during high-impact activity — the disc can shift during running or jumping for some anatomies.
• Learning curve for insertion is different from cups — reaching the fornix requires a different angle and depth.
• Fewer reusable options compared to cups (market is growing — Lumma, Ziggy Cup, Hello Disc are reusable options).

Period Underwear — The Backup and Standalone Option

Period underwear uses a layered absorbent textile system sewn into regular underwear construction. It’s the most accessible entry point to low waste periods — no insertion learning curve — and works well as:

• Backup for cup or disc (catches any overflow during the learning phase)
• Standalone product for light days, spotting, or the tail end of a period
• Overnight protection where cup emptying is inconvenient

Key buying consideration: PFAS (forever chemicals) testing. Several major period underwear brands (Thinx, among others) were found to contain PFAS in their moisture barrier layers in 2020–2022 independent testing. Since then, many brands reformulated. Look for brands that publish independent third-party PFAS testing results (OEKO-TEX STANDARD 100 certification requires testing for some harmful substances, though not all PFAS). Brands that explicitly certify PFAS-free with published test data: Modibodi, Saalt Wear, Flux Undies.

Reusable Pads — For Those Who Prefer External Products

Cloth pads (flannel, organic cotton, bamboo-cotton blend) snap around underwear and are machine-washable. They’re not zero waste in the strictest sense — manufacturing still uses resources — but they eliminate 100% of ongoing waste and perform equivalently to disposable pads once you have a rotation of 8–12 pads.

The environmental bonus of cloth and organic materials connects to the same principles driving zero waste kitchen choices — see our Reusable Produce Bags Cotton Organic for related material sourcing considerations.

Low Waste Menstrual Products Comparison

More Zero-Waste Swaps

Extend low waste living beyond the bathroom:

Browse all reusable menstrual products: Amazon reusable menstrual products

Frequently Asked Questions

How do I know which cup size is right without trying multiple?

Use the Put A Cup In It quiz (free online tool) — it’s the most comprehensive algorithm-based cup recommender, using cervix height, flow, age, and childbirth history to generate a ranked shortlist from 70+ cup models. It’s more accurate than manufacturer sizing guides. If you still end up with the wrong size, most reputable cup brands have exchange programs for first-time buyers. The cost of a second cup is still far below the cost of disposables you’re replacing.

Is the cup-emptying process practical in a public restroom?

Manageable with a standard 12-hour wear time — most people empty only at home. For situations requiring mid-day changes: rinse the cup at the sink (or wipe with toilet paper if no sink access), reinsert. Period underwear as backup prevents any flow if the cup fills faster than expected. The disc’s auto-dump mechanism is more discreet for public restroom management. After one full cycle, most users develop a routine that requires no more time than tampon changes.

Can I use a menstrual cup with an IUD?

This requires medical guidance. There are documented cases of IUD expulsion associated with cup use, likely due to suction near the cervix during cup removal. The risk is considered low but not zero. If you have an IUD, consult your healthcare provider before using a cup. Practical mitigations some providers suggest: break suction completely before removal (pinch the base to collapse the cup before pulling), use a disc instead of a cup (disc removal doesn’t involve suction near the cervix), and check IUD strings monthly as you would normally.

How do I clean and sterilize a menstrual cup between cycles?

During a cycle: rinse with cold water first (hot water sets protein stains), then warm water with unscented soap. Between cycles: boil in water for 5–7 minutes (or use a microwave sterilizing cup with water, 3 minutes on high). Store dry in a breathable cotton bag — never in an airtight container, which promotes bacterial growth. Avoid: antibacterial soaps (disrupt vaginal flora), oil-based soaps or lubricants (degrade silicone), dishwasher (degrades silicone faster and ineffective sterilization).

Are “organic” disposable tampons worth using if I’m not ready to switch to a cup?

Better for your body than conventional tampons with synthetic rayon and fragrance, but not meaningfully better for waste. The cotton is organic, but it’s still single-use, still wrapped in non-recyclable packaging, and still generates 2,000+ units of waste over a decade. Organic disposables are a reasonable harm-reduction step during transition, not a destination. If the cup learning curve is the barrier, start with period underwear as a standalone or backup — zero waste, zero learning curve — and work toward a cup when you’re ready. See our zero waste bathroom essentials and eco-friendly cleaning supplies guides for parallel household swaps.