Aisle · Menstrual Cups
August Medical Grade Soft Silicone Period Cup
Lower PFAS concern, silicone period cups are inherently low-risk, though Aisle offers no explicit PFAS disclosure.
Aisle's August cup is made from medical-grade silicone, a non-fluorinated elastomer not typically treated with PFAS durable water repellents or stain finishes. Period cups have no nonstick coatings, waterproof textiles, or food-contact grease barriers that commonly introduce PFAS.
Shop Aisle on Amazon →Material
Medical-grade silicone (primary); no Teflon-family coating or Teflon-type coating disclosed
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 Aisle August cup is constructed from medical-grade silicone, a synthetic rubber polymer that does not contain BPA, phthalates, or PVC. Medical-grade silicone has a long track record in healthcare devices (implants, catheters) and is chemically inert across normal menstrual use temperatures. Unlike latex or some plastics, silicone does not leach endocrine disruptors or plasticizers into bodily fluids under typical storage and insertion conditions.
The brand's record and disclosure
Aisle has not published third-party toxicology testing or explicit PFAS statements for the August cup. The brand does not list certifications such as FDA clearance, OEKO-TEX, or independent lab validation on available product pages. No recalls or safety controversies specific to Aisle menstrual cups have been publicly reported. Lack of disclosure does not indicate a problem, but transparency on material sourcing and PFAS testing would strengthen consumer confidence.
How it compares in its category
Silicone menstrual cups (including competitors like Saalt, Lunette, and DivaCup) are considered safer than tampons or pads in terms of chemical exposure because the material is non-absorbent and non-reactive. The August cup's reported 10-year lifespan is typical for medical-grade silicone; durability and reusability reduce plastic waste compared to disposables. Most silicone cup brands offer similarly minimal public hazard data, making Aisle's silence unremarkable within the market.
If you buy it
Wash the cup in warm soapy water before first use and between each cycle; do not boil excessively (high heat over time can degrade any silicone product, though medical-grade is very heat-stable). Store in a breathable pouch to prevent moisture trapping and microbial growth. Replace if you notice cracks, discoloration, or a persistent odor that soap cannot remove; medical-grade silicone is durable but not permanent. If you experience irritation, discontinue use and consult a healthcare provider.
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.”
Microbial contamination from improper storage or cleaning
Silicone itself does not harbor bacteria, but moisture retention in storage pouches or biofilm buildup from incomplete cleaning can occur with any cup. Risk is minimal with routine washing and air-drying; use of boiling water or hydrogen peroxide rinses mitigates this.
Silicone degradation or off-gassing with age
No published reports of medical-grade silicone menstrual cups degrading or releasing volatile compounds during normal use. Extreme heat (prolonged boiling, autoclaving) can theoretically degrade silicone, but this is outside typical consumer practice.
Allergic reaction or irritation
True silicone allergy is rare, but some users report vulvovaginal irritation from cup insertion, which is usually mechanical (improper sizing or insertion technique) rather than chemical. Sensitivity to residual manufacturing compounds is theoretically possible but undocumented for this brand.
Heavy metals or impurities in raw silicone resin
Medical-grade silicone is subject to manufacturing standards that exclude heavy metal contamination; no published analysis of Aisle cups has identified lead, cadmium, or arsenic. Absence of disclosure does not indicate presence of contaminants.
Fragrance or additive sensitivities
The August cup is reported to be unscented and unflavored, eliminating fragrance allergen risk. No added dyes or coatings are disclosed, reducing exposure to synthetic colorants.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 82% 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.