Aisle · Menstrual Cups
Lena Menstrual Cup
Lower concern, silicone menstrual cups rarely require PFAS treatments, but Aisle provides no explicit material transparency.
The Lena Menstrual Cup is made from medical-grade silicone, a material that does not typically require PFAS coatings or water repellent treatments. Aisle does not publicly disclose PFAS testing or make explicit PFAS-free claims.
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Medical-grade silicone
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 Lena Cup is constructed from medical-grade silicone, a non-porous elastomer that does not require coatings, glazes, or chemical treatments that would introduce heavy metals or problematic additives. Medical-grade silicone is inert across typical use temperatures (room temperature to brief boiling for sterilization) and does not leach estrogens, plasticizers, or other endocrine disruptors that affect lower-quality plastics. Silicone's molecular structure is Si-O bonds without organic plasticizers like phthalates or BPA, making it a structurally safer choice than many reusable alternatives.
The brand's record and disclosure
Aisle has published minimal material transparency documentation; the company does not provide third-party certifications (such as FDA 510(k), ISO 10993, or independent lab reports confirming medical-grade claims). No public recalls, contamination incidents, or safety complaints are on record for the Lena Cup. The brand's silence on PFAS and manufacturing standards is a transparency gap, not evidence of contamination, but limits independent verification of medical-grade claims.
How it compares in its category
Menstrual cups occupy a lower-hazard category than most consumer health products because they are non-absorbent, non-porous, and subject to minimal regulatory scrutiny compared to tampons or pads. Medical-grade silicone cups (Lena, Lunette, Diva Cup) show no established safety differentiators; the main risk is degradation over years of use. The Lena Cup's specification is typical for this product class and lacks known material disadvantages relative to competitors.
If you buy it
Sterilize by boiling in water for 5-10 minutes monthly; do not use bleach or harsh chemicals that may degrade silicone over time. Replace the cup every 5-10 years or if you notice visible cracks, cloudiness, or texture changes. Do not expose to direct heat sources (stovetop flame, microwave) as prolonged heating can accelerate polymer aging. Store in a clean, dry pouch away from sunlight and extreme temperatures.
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 over time
Medical-grade silicone is stable for years of use, but repeated thermal cycling (boiling sterilization) and prolonged storage may eventually cause surface micro-cracking or loss of elasticity. No cases of Lena Cup degradation-linked injury are documented, but replacement every 5-10 years is a prudent practice.
Vaginal microbiome disruption or allergic reaction
Medical-grade silicone is biocompatible and non-allergenic in clinical use; no case reports link silicone menstrual cups to vulvovaginal allergies or dysbiosis. Reported issues (discomfort, infection) are typically linked to improper cleaning, infrequent replacement, or user fit rather than material toxicity.
Manufacturing residues (uncured monomers or catalysts)
Aisle does not publish post-manufacture wash or quality protocols; if medical-grade silicone is not properly cured and rinsed, residual platinum catalysts or oligomers could theoretically leach. This is a general silicone product risk, not specific to Lena, but lack of published testing limits confidence.
Labeling accuracy of 'medical-grade' claim
No third-party certification (FDA, ISO 10993 biocompatibility testing) is publicly disclosed for the Lena Cup. The term 'medical-grade' is not regulated and does not guarantee FDA clearance or clinical testing. This is a transparency and claims-substantiation issue, not a chemical hazard per se.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 75% 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.