Calpak · Insulated Drinkware Tumblers
16oz Insulated Hot Tumbler
Lower concern. Stainless steel tumbler with no known PFAS-prone treatments.
Insulated tumblers typically use stainless steel and insulation foam without intentional PFAS. Calpak discloses no coatings or special treatments. No red flags detected.
Shop Calpak on Amazon →Material
Stainless steel exterior, plastic/silicone interior
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.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
This tumbler combines a stainless steel exterior (inert, durable, minimal leaching risk) with a plastic or silicone interior liner. Stainless steel does not leach nickel or other metals under normal beverage storage conditions. The interior material is the relevant exposure point: if silicone, it is generally stable and non-leaching; if plastic (likely polypropylene or similar), the risk depends on whether it contacts hot liquids and the polymer's thermal stability. Insulated designs typically have air gaps rather than direct contact between contents and exterior metal.
The brand's record and disclosure
Calpak is a luggage and travel accessories brand with limited public disclosure on material sourcing or chemical safety testing for drinkware. No major recalls or safety controversies on record for this product line. The brand does not advertise third-party certifications (e.g., BPA-free claims, FDA compliance statements) prominently, which is typical for mid-market travel goods but leaves composition transparency gaps. Silent stance on PFAS is consistent with industry norm for non-premium cookware/drinkware brands.
How it compares in its category
Insulated tumblers range widely in hazard profile. Stainless steel construction is safer than aluminum-lined or unlined plastic alternatives, which can leach or degrade. Calpak's design avoids Teflon-type coating coatings (common in premium thermal mugs, which carry fume risk) and ceramic liners (which may contain lead in glazes if sourced from regions with weak standards). Price point suggests this is a functional travel product rather than a high-end or heavily treated variant, reducing chemical risk overall.
If you buy it
Do not fill with liquids hotter than 140°F if the interior is plastic; silicone is more heat-tolerant up to 200°F. Hand-wash and air-dry to avoid degradation of interior polymers in dishwashers. Inspect the interior lining annually for cracks, discoloration, or odor changes that signal wear; replace if compromised. Avoid prolonged storage of acidic beverages (citrus, vinegar) which may accelerate minor leaching, though stainless steel itself resists this.
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 interior leaching (BPA/phthalates)
If interior is polycarbonate or other commodity plastic rather than polypropylene, and if exposed to sustained heat or acidic contents, minor leaching is possible. No specific test results on record for this Calpak model. Silicone interior would carry none_known risk.
Coating degradation over time
Insulated tumbler seals and interior linings can separate or crack with age and repeated thermal cycling. This is a durability issue rather than acute toxicity but can allow stainless steel exposure or microleakage. Expected service life is typically 2-3 years with moderate use.
Nickel leaching from stainless steel
Standard 18/8 stainless steel (austenitic grade) does not leach nickel under normal beverage storage. Risk only arises if tumbler is damaged, corroded, or made from low-grade ferrous metal mislabeled as stainless. No recalls or reports for this product.
Microplastic shedding from interior liner
Plastic liners subject to scratching or thermal stress may shed microscopic particles. No data specific to this model. Silicone lining would mitigate this risk; polymer composition is not publicly specified by brand.
Mold or bacterial growth in seal/lid
Insulated tumblers with narrow necks and silicone or rubber gaskets are prone to trapped moisture and biofilm if not dried thoroughly. This is a hygiene rather than chemical hazard but affects safe reuse.
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 Insulated Drinkware Tumblers
Contigo
Byron 2.0 Stainless Steel Travel Mug Snapseal
Stainless steel, silicone gasket
Travel mug with lower PFAS concern; stainless steel typically safe.
✓Bare metal or glass, no coating at all
Thermos
Stainless King Travel Tumbler
Stainless steel exterior, vacuum-insulated, minimal internal coating
Lower concern. Stainless steel tumbler with standard design, no PFAS-prone features.
✓Bare metal or glass, no coating at all
Thermos
Stainless Steel Tumbler w/ Slide Lock Lid
Stainless steel tumbler with plastic slide lock lid
Lower concern. Stainless steel is PFAS-free; monitor lid material.
✓Bare metal or glass, no coating at all
More insulated drinkware 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.