The Best Non-Toxic Menstrual Cups of 2026

We scored 15 menstrual cups for PFAS forever chemicals and other hazards, then ranked them safest first. The top pick is Flex Flex Cup Starter Bundle at 70/100. Every score below links to the full breakdown of what earned it.

How to read these scores. PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Each grade is a model-based assessment built from published ingredient lists, materials, certifications, brand disclosures, recalls and third-party lab results where they exist. Read the full rubric to see exactly what adds and removes points.
0% of the 15 menstrual cups we scored fail our PFAS and toxin screen.
PFAS Authority, September 2026. Free to cite with a link. See the full dataset.

The safest PFAS-free menstrual cups we have scored

  1. 1
    Flex Cup Starter Bundle

    Flex

    Cup Starter Bundle

    Medical-grade silicone, no added Teflon-family coating

    PFAS Grade70Good
    Overall Grade62Good
    🏭

    Residual manufacturing compounds / silicone impurities

    Limited concern

    70
    ⚠️

    Mold or bacterial colonization from improper storage

    Limited concern

    70

    Lower concern, silicone menstrual cups have minimal PFAS exposure pathways, but Flex hasn't publicly disclosed testing.

    ⚠Risky category by default

    Why this gradeBuy
  2. 2
    Flex Menstrual Discs

    Flex

    Menstrual Discs

    Medical-grade silicone

    PFAS Grade70Good
    Overall Grade48Poor
    🫧

    Silicone degradation and particulate shedding

    Limited concern

    70
    ⚠️

    Allergen/irritant sensitivity to silicone additives

    Limited concern

    70
    ⚠️

    Bacterial colonization from improper cleaning

    Moderate concern

    45
    💨

    Off-gassing or odor from manufacturing residues

    Limited concern

    70

    Lower concern since silicone-based period product has no known PFAS risk, but brand provides no transparency.

    ⚠Risky category by default

    Why this gradeBuy
  3. 3
    Flex Cup Menstrual Slim Pack of 1

    Flex

    Cup Menstrual Slim Pack of 1

    Medical-grade silicone

    PFAS Grade70Good
    Overall Grade62Good
    ⚠️

    Bacterial or mold colonization from poor maintenance

    Limited concern

    70
    🏭

    Contaminants from manufacturing residue

    Limited concern

    70

    Lower-concern product since silicone menstrual cups rarely require PFAS treatments.

    ⚠Risky category by default

    Why this gradeBuy
  4. 4
    Reusable Menstrual Cup | Flex Cup Size 01

    Flex

    Reusable Menstrual Cup | Flex Cup Size 01

    Medical-grade silicone

    PFAS Grade70Good
    Overall Grade62Good
    ⚠️

    Bacterial or fungal colonization

    Limited concern

    70
    ⚠️

    Allergic contact dermatitis or sensitization

    Limited concern

    70

    Lower PFAS concern, medical-grade silicone has no known PFAS need, but Flex doesn't publicly address it.

    ⚠Risky category by default

    Why this gradeBuy
  5. 5
    Flex Reusable Menstrual Disc

    Flex

    Reusable Menstrual Disc

    medical-grade silicone

    PFAS Grade70Good
    Overall Grade52Good
    ⚠️

    Bacterial or fungal contamination

    Limited concern

    70
    ♾️

    PFAS

    Limited concern

    70
    ⚠️

    Loss of elasticity and structural failure

    Moderate concern

    45

    Lower-concern choice since silicone isn't a PFAS vector, but brand offers no transparency.

    ⚠Risky category by default

    Why this gradeBuy
  6. 6
    Silicone Menstrual Cups

    Flex

    Silicone Menstrual Cups

    Medical-grade silicone (body-contact surface)

    PFAS Grade70Good
    Overall Grade52Good
    ⚠️

    Bacterial or fungal biofilm growth on cup surface

    Limited concern

    70
    ⏳

    Surface degradation or discoloration over extended use

    Moderate concern

    45
    🏷️

    PFAS

    Limited concern

    70

    Lower-concern product since silicone cups don't require PFAS-prone treatments, but manufacturer silence on sourcing limits full confidence.

    ⚠Risky category by default

    Why this gradeBuy
  7. 7
    Menstrual Cup Saalt

    Saalt

    Menstrual Cup Saalt

    Medical-grade silicone

    PFAS Grade70Good
    Overall Grade62Good
    ⚠️

    Bacterial and fungal growth

    Limited concern

    70
    ⚠️

    Allergic reaction to silicone

    Limited concern

    70

    Lower PFAS concern since silicone menstrual cups aren't typical PFAS carriers, but Saalt doesn't disclose.

    ⚠Risky category by default

    Why this gradeBuy
  8. 8
    Saalt Menstrual Cup Twin Pack

    Saalt

    Menstrual Cup Twin Pack

    Medical-grade silicone (primary); no reported coatings

    PFAS Grade70Good
    Overall Grade54Good
    ⏳

    Silicone degradation over time

    Limited concern

    70
    ⚠️

    Bacterial or mold growth from storage

    Limited concern

    70
    ⚠️

    Allergic reaction to silicone or additives

    Limited concern

    70
    ⚠️

    Vaginal irritation from improper fit or insertion

    Limited concern

    70

    Lower PFAS concern since silicone cups aren't typical PFAS vectors, but brand discloses nothing.

    ⚠Risky category by default

    Why this gradeBuy

Every menstrual cups that passes, side by side

Sorted by score. Higher is safer. Scored against 4 hazards that apply to this category.

#Menstrual CupsScoreRatingMade of
1Flex Flex Cup Starter Bundle70GoodMedical-grade silicone, no added fluoropolymers
2Flex Flex Menstrual Discs70GoodMedical-grade silicone
3Flex Flex Cup Menstrual Slim Pack of 170GoodMedical-grade silicone
4Flex Reusable Menstrual Cup | Flex Cup Size 0170GoodMedical-grade silicone
5Flex Flex Reusable Menstrual Disc70Goodmedical-grade silicone
6Flex Silicone Menstrual Cups70GoodMedical-grade silicone (body-contact surface)
7Saalt Menstrual Cup Saalt70GoodMedical-grade silicone
8Saalt Saalt Menstrual Cup Twin Pack70GoodMedical-grade silicone (primary); no reported coatings

The menstrual cups we would skip

Lowest scoring in this category, worst first.

Flex Cup Starter Bundle

Flex

Cup Starter Bundle

Medical-grade silicone, no added Teflon-family coating

PFAS Grade70Good
Overall Grade62Good
🏭

Residual manufacturing compounds / silicone impurities

Limited concern

70
⚠️

Mold or bacterial colonization from improper storage

Limited concern

70

Lower concern, silicone menstrual cups have minimal PFAS exposure pathways, but Flex hasn't publicly disclosed testing.

⚠Risky category by default

Why this gradeBuy
Flex Menstrual Discs

Flex

Menstrual Discs

Medical-grade silicone

PFAS Grade70Good
Overall Grade48Poor
🫧

Silicone degradation and particulate shedding

Limited concern

70
⚠️

Allergen/irritant sensitivity to silicone additives

Limited concern

70
⚠️

Bacterial colonization from improper cleaning

Moderate concern

45
💨

Off-gassing or odor from manufacturing residues

Limited concern

70

Lower concern since silicone-based period product has no known PFAS risk, but brand provides no transparency.

⚠Risky category by default

Why this gradeBuy
Flex Cup Menstrual Slim Pack of 1

Flex

Cup Menstrual Slim Pack of 1

Medical-grade silicone

PFAS Grade70Good
Overall Grade62Good
⚠️

Bacterial or mold colonization from poor maintenance

Limited concern

70
🏭

Contaminants from manufacturing residue

Limited concern

70

Lower-concern product since silicone menstrual cups rarely require PFAS treatments.

⚠Risky category by default

Why this gradeBuy

What we check on menstrual cups

  • BPA & bisphenols. Plastic-hardening chemicals linked to hormone disruption. FDA
  • Phthalates. Plastic softeners studied for endocrine effects. ATSDR
  • Microplastics. Tiny plastic particles that shed from products into food and water. EPA
  • Endocrine disruptors. Chemicals that interfere with the body’s hormone system. NIEHS

Full point-by-point rubric on the methodology page.

The menstrual cups brands that will not say

4 of the brands here publish nothing about PFAS at all. Silence is not evidence of harm, but it is why none of them score well on disclosure.

Diva Cup, Flex, Lena, Saalt.

Common questions about PFAS-free menstrual cups

Is menstrual cups PFAS free?

Mostly not. Of the 15 menstrual cups we have scored, 0% fail our PFAS and toxin screen, which leaves 15 that pass. The highest scoring is Flex Flex Cup Starter Bundle at 70 out of 100. The lowest is Flex Flex Cup Starter Bundle at 70.

What is the safest menstrual cups you have scored?

Flex Flex Cup Starter Bundle, at 70 out of 100, which we band as Good. It is medical-grade silicone, no added fluoropolymers. The runner up is Flex Flex Menstrual Discs at 70.

Which menstrual cups should I avoid?

The three lowest scoring we hold are Flex Flex Cup Starter Bundle at 70, Flex Flex Menstrual Discs at 70, Flex Flex Cup Menstrual Slim Pack of 1 at 70. The problem with the first is that made from ceramic, mineral, or natural fiber with no PFAS risk.

How can you tell if menstrual cups contain PFAS?

In this category we check for bpa & bisphenols, phthalates, microplastics, endocrine disruptors. Plastic-hardening chemicals linked to hormone disruption. Language like stain resistant, water repellent or easy release usually means fluorinated chemistry even when PFAS is never printed on the box.

Which menstrual cups brands will not say whether they use PFAS?

4 of the brands we scored in this category publish nothing about PFAS at all, including Diva Cup, Flex, Lena, Saalt. Silence is not evidence of harm, but it is the reason those brands cannot score well on disclosure.

Do you lab test menstrual cups?

No. We score from published ingredient lists, materials, certifications, disclosures and third party lab results where they exist. Where a product has been independently tested we use that result and say so.

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Want to filter the whole category yourself? Browse all 15 menstrual cups.