Nixit · Menstrual Cups
Nixit Menstrual Cup
Lower concern; silicone menstrual cups lack the coatings and treatments typical of PFAS-risk products, though no explicit brand statement available.
Nixit's menstrual cup is made from medical-grade silicone, a material not typically associated with PFAS contamination. Menstrual cups don't require water-repellent, stain-resistant, or nonstick coatings, the typical vectors for PFAS in consumer products.
Shop Nixit on Amazon →Material
Medical-grade silicone (primary); proprietary silicone blend
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
Nixit uses medical-grade silicone as its primary material, the same polymer class approved for implantable medical devices and long-term bodily contact. Medical-grade silicone is chemically inert, does not leach plasticizers (unlike lower-grade plastics), and resists degradation from body heat and menstrual fluid pH. The proprietary silicone blend is formulated to maintain flexibility and durability through repeated sterilization cycles. This material class has decades of clinical safety history for intimate-contact applications.
The brand's record and disclosure
Nixit does not publish explicit PFAS testing statements, which is typical for silicone menstrual cup brands; the company does not appear to have faced product safety recalls or regulatory actions. The brand markets medical-grade certification but does not provide independent third-party test reports on their website. No established controversies regarding manufacturing practices or material sourcing have been documented in public records. Standard medical-device silicone suppliers (e.g., Momentive, Dow Corning) do not use PFAS treatments in silicone feedstock for this application.
How it compares in its category
Silicone menstrual cups (Nixit, Diva Cup, Flex Cup, others) occupy the safety-preferred segment compared to older latex or rubber designs. Most medical-grade silicone cups lack the coating technologies (nonstick, water-repellent) that introduce PFAS in cookware or textiles, making them inherently lower-PFAS products. Nixit's material profile is consistent with competitor offerings; no credible evidence suggests Nixit's blend is riskier or safer than comparable brands. The category as a whole has good epidemiological safety data from years of widespread use.
If you buy it
Sterilize before first use and after each cycle by boiling for 5-10 minutes or using a dedicated menstrual cup sterilizer; do not use bleach or hydrogen peroxide, which can degrade silicone over time. Inspect the cup monthly for cracks, tears, or discoloration; replace if structural integrity is compromised (typically 5-10 years with proper care). Store in a breathable pouch or open container; never seal in plastic for extended periods to prevent mold or odor. Avoid prolonged exposure to direct sunlight, which can cause slow silicone hardening, though this does not affect safety within normal product life.
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.”
Silicone degradation and leaching
Medical-grade silicone used by Nixit is chemically stable at body temperature and pH ranges encountered during menstrual use. No established literature reports leaching of silicone oligomers or breakdown products from intact medical-grade cups at physiological conditions.
Bacterial or fungal colonization
Silicone is biologically inert but can harbor biofilm if not cleaned thoroughly or stored in moist conditions. This is a use-maintenance issue, not a material hazard; regular boiling sterilization mitigates risk.
Allergic sensitization (silicone contact dermatitis)
Medical-grade silicone is hypoallergenic by design and used in implants and breast prosthetics with minimal allergy reports. No specific adverse event reports link Nixit cups to silicone allergy.
Foreign substance residues (mold, manufacturing contaminants)
Nixit does not disclose manufacturing QC or contaminant testing protocols publicly. Medical-device silicone typically undergoes bioburden and residue testing by ISO 10993 standards, though Nixit's compliance is not independently verified.
Heat stability and sterilization safety
Silicone menstrual cups are rated for boiling and autoclave sterilization by design. No thermal degradation or off-gassing hazards are reported at temperatures used for home or clinical sterilization.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% 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.