Nixit · Menstrual Cups
Best Periodt Menstrual Cup
Lower PFAS concern; silicone menstrual cups not a typical PFAS vector, but brand lacks transparency.
Nixit's menstrual cup is made from medical-grade silicone, a material not typically associated with intentional PFAS use or Teflon-family coating coatings. No public PFAS-related disclosures or claims exist from the brand.
Shop Nixit on Amazon →Material
Medical-grade silicone (body); no reported coatings
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
period care is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
The Nixit cup body is stated to be medical-grade silicone, a non-porous elastomer with minimal chemical leaching potential during normal vaginal use. Medical-grade silicone is not formulated with BPA, phthalates, or typical plasticizers that would migrate into bodily fluids. The material does not degrade or off-gas harmful volatile compounds at body temperature (unlike some lower-grade silicones or TPE alternatives). Silicone's inert nature is why it is the industry standard for menstrual cups and internal medical devices.
The brand's record and disclosure
Nixit has not published detailed material safety data sheets, independent third-party certifications (FDA clearance, ISO 10993 biocompatibility testing), or public PFAS testing results. The brand does not disclose manufacturing location, supply-chain audits, or post-market safety monitoring practices. Without access to formal certifications or transparent recall history, claims of medical-grade status cannot be independently verified. This opacity is a weakness in an otherwise sound material choice, as competitors like Saalt and Lena have pursued FDA 510(k) clearance or published biocompatibility summaries.
How it compares in its category
Menstrual cups occupy a narrow safety space: silicone, TPE (thermoplastic elastomer), and natural rubber are the main body materials. Silicone is the safest substrate for direct mucosal contact because it resists bacterial colonization and does not leach endocrine disruptors. Nixit's medical-grade silicone claim places it in the peer group of Saalt, Lena, and Diva Cup, though without published biocompatibility test reports. TPE cups (e.g., some budget brands) carry higher leaching risk; natural rubber introduces latex allergy liability. On material grounds alone, Nixit is average-to-strong for the category.
If you buy it
Rinse thoroughly with water before first use and after each cycle. Do not boil for extended periods (high heat can degrade silicone over time, though brief sanitization is safe); store in a breathable pouch to prevent bacterial biofilm growth. Replace if the cup develops visible cracks, persistent odor, or discoloration after 5-10 years of use, even if silicone remains physically intact. If you experience irritation, rash, or allergic symptoms, discontinue immediately and consult a gynecologist; individual sensitivity to silicone is rare but documented.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Bacterial and fungal colonization (biofilm)
Menstrual cups are at-risk devices for pathogen accumulation if not cleaned or stored correctly. While silicone's non-porosity is protective, improper rinsing or damp storage can promote Staphylococcus aureus or yeast growth. Nixit's marketing does not provide detailed cleaning guidance or recommend sterilization frequency (standard: boil 5-10 minutes weekly).
Allergic contact dermatitis or mucosal irritation
Although medical-grade silicone is hypoallergenic, individual sensitivity or reactions to silicone additives (e.g., amorphous silica fillers, platinum catalysts) are documented in a small percentage of users. Nixit does not disclose the exact silicone formulation or cross-reactivity risk. Pre-existing vulvovaginal dermatitis or latex sensitivity may increase risk.
Leaching of silicone oligomers or processing residues
Medical-grade silicone is engineered to minimize leachable oligomers, and no public data on Nixit cups shows migration of silicone degradation products into menstrual fluid or tissue. However, without independent biocompatibility testing or migration studies published by Nixit, this cannot be ruled out as a theoretical concern for long-term vaginal exposure.
Manufacturing contaminants (heavy metals, residual catalysts)
Platinum or other catalysts used in silicone polymerization can leave trace residues if not fully removed. No recalls or adverse event reports link Nixit cups to heavy-metal contamination. Lack of published testing or certification means contamination levels are unverified rather than proven safe.
Lack of regulatory clearance or third-party certification
Nixit is marketed as a medical device but has not disclosed FDA 510(k) approval status or ISO 10993 biocompatibility certification. This is not definitive proof of unsafety, but it means the product operates in a regulatory gray zone and cannot be independently audited by consumers or regulators.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 78% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Menstrual Cups
Aisle
DIVA Cup Model 2
Medical-grade silicone (body); no Teflon-type coating or Teflon-family coating coatings
Lower-concern menstrual cup; silicone construction and PFAS-free commitment make it a reasonable choice.
✓Verified PFAS-free by a third party
Ruby Cup
Steriliser
Stainless steel heating chamber with silicone/plastic components
Lower-concern menstrual cup sterilizer; stainless core typical for appliances, but silicone/plastic parts unspecified, contact brand for material detail.
⚠Risky category by default
Ruby Cup
Steriliser Purple
stainless steel steriliser/heating element
Lower PFAS concern; no high-risk coatings typical of this product category.
⚠Risky category by default
More menstrual cups grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.