Cuppa · Insulated Drink Tumblers
To Go Tumbler
Lower concern. Standard tumbler with no known PFAS risks.
Cuppa's to-go tumbler uses stainless steel, an inherently PFAS-free material. No evidence of water-repellent coating coatings or nonstick treatments that typically introduce PFAS.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel with plastic lid
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
Category baseline
other is a category where PFAS exposure is more common.
The full breakdown
What it's made of and why it matters
The Cuppa To Go Tumbler uses food-grade stainless steel (typically 18/8 or 18/10 alloy) for the main vessel, which is chemically inert and does not leach metals into beverages under normal use. The plastic lid is the component of concern; most tumbler lids use polypropylene (PP) or polyethylene terephthalate (PET), both considered low-risk for cold and warm (not boiling) liquids. Stainless steel construction avoids the coating-degradation and Teflon-type coating fume risks associated with non-stick cookware.
The brand's record and disclosure
Cuppa maintains a public-facing product line but has not issued prominent PFAS-free certifications or material transparency disclosures in widely available sources. The brand's silence on PFAS and chemical testing is typical for mid-market drinkware manufacturers and does not indicate proven misconduct. No major recalls or safety controversies are documented for this specific product model in public databases.
How it compares in its category
Stainless steel tumblers are among the safer reusable drinkware options, preferred over aluminum (leaching risk) and ceramic with unknown glazes (potential lead). Cuppa's plastic-lid design is standard across the category; premium competitors (Hydro Flask, S'well) use similar constructions. The lack of explicit PFAS testing is shared across most consumer tumbler brands unless specifically marketed otherwise.
If you buy it
Hand-wash or use cooler machine cycles to minimize wear on the plastic lid seal over time. Do not fill with boiling water repeatedly, as sustained high heat can stress plastic components. Replace the lid if cracks, cloudiness, or persistent odor develops, as degraded plastic may leach compounds. Avoid prolonged storage of acidic beverages (citrus, vinegar) in direct contact with any lid gaskets, as acidity can accelerate plastic aging.
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.”
Plastic lid degradation and leachables
Polypropylene and polyethylene lids are stable under normal cold and warm use but can degrade with thermal cycling and acidic/alcoholic contents. No hazardous leaching is established at typical use temperatures, but visible wear warrants replacement.
Bacterial growth in lid seals
The junction between plastic lid and stainless steel body can trap moisture and residue if not dried thoroughly after washing. This is a hygiene concern rather than a chemical hazard; proper cleaning and air-drying mitigate risk.
BPA or BPS in plastic lid
Most modern polypropylene tumbler lids are manufactured without BPA; however, Cuppa has not published material certifications confirming this. The risk is low given PP is generally BPA-free by industry standard, but official confirmation is absent.
Metal leaching from stainless steel
High-quality 18/8 stainless steel does not leach chromium, nickel, or manganese into beverages under normal cold and warm use. Risk increases only with prolonged storage of highly acidic liquids or damage to the interior surface.
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.
More insulated drink tumblers 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.