Ruby Cup · Menstrual Cups
Ruby Cup menstrual cup 2 -pack -size S + M (light/strong days) -including 2 donations!Soft and ergonomic- ideal for beginners -rot
Lower PFAS concern; silicone menstrual cups rarely require PFAS treatments, but Ruby Cup doesn't publicly disclose composition details.
Ruby Cup menstrual cups are made from medical-grade silicone, a material not typically associated with PFAS treatments. Silicone doesn't require water-repellent, stain-resistant, or non-stick coatings that often contain PFAS.
Shop Ruby Cup on Amazon →Material
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
Ruby Cup is manufactured from medical-grade silicone, a synthetic polymer designed for biomedical use and typically free of BPA, phthalates, and other endocrine disruptors common in cheaper plastics. Medical-grade silicone resists degradation during repeated sterilization (boiling, microwaving) and does not leach when in contact with body fluids or heat. The material is inert at human body temperature and the product does not require chemical coatings or flame retardants.
The brand's record and disclosure
Ruby Cup does not publicly disclose detailed material sourcing, manufacturing location, or third-party safety certifications (such as FDA 510(k) clearance or ISO 10993 biocompatibility testing results). The brand markets itself as body-safe but provides no published safety data sheet or independent verification. No significant recalls, contamination incidents, or consumer complaints appear on record for Ruby Cup menstrual cups.
How it compares in its category
Medical-grade silicone menstrual cups (including Ruby Cup, Saalt, and others) carry a lower chemical hazard profile than disposable pads or tampons, which may contain bleach residues, absorbency chemicals, or microplastic fibers. Competitor brands like Saalt and Nixit provide more transparent third-party certifications. Ruby Cup's lack of published biocompatibility data is typical of smaller independent brands but is a gap compared to FDA-cleared devices.
If you buy it
Boil the cup for 5-10 minutes before first use and monthly after. Do not expose to extreme heat above 80C (176F) repeatedly, as silicone can eventually lose elasticity, though this requires years of use. Replace immediately if you notice tears, permanent deformation, or discoloration that does not wash out. Store in a breathable pouch, not sealed plastic, to prevent bacterial or mold growth in damp conditions.
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 (long-term)
Medical-grade silicone is chemically stable, but no published data confirms Ruby Cup's specific formulation resists degradation beyond 5-10 years of use. Manufacturer does not specify expected product lifespan or degradation timeline.
Bacterial or fungal contamination (improper storage/cleaning)
Any reusable menstrual cup can harbor bacteria or mold if not dried thoroughly or stored in sealed, moist containers. This is a usage issue, not a material hazard, but Ruby Cup provides minimal cleaning/storage guidance on packaging.
Allergens in silicone or coloring additives
Ruby Cup does not disclose whether colorants (the product is available in multiple colors) are FDA-approved pigments or whether the silicone contains preservatives. No allergic reaction reports are on record, but sensitive users lack detailed ingredient transparency.
Absence of biocompatibility certification
Ruby Cup is not FDA-cleared as a medical device and does not publicly claim ISO 10993 biocompatibility testing. This is a compliance and transparency gap, not confirmed toxicity, but means third-party safety verification is unknown.
Manufacturing transparency and quality control
Ruby Cup does not disclose manufacturing site, quality assurance protocols, or whether the silicone is virgin or recycled. Without public certification (ISO 13485, GMP status), the consistency of batch-to-batch chemical purity cannot be independently verified.
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.