Calpak · Insulated Drinkware Tumblers
Vacuum Insulated Tumbler (11 oz)
Lower concern, typical insulated tumbler design. No PFAS disclosure.
Vacuum insulated tumblers using stainless steel walls and plastic lids pose lower inherent PFAS risk. Calpak provides no PFAS claims or certifications; contact brand for coating specifics on lid seals.
Shop Calpak on Amazon →Material
Vacuum-insulated stainless steel and 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.
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 uses a double-wall stainless steel construction (interior and exterior) with a vacuum seal between them, which eliminates direct contact between beverages and plastic. The plastic lid is the only food-contact polymer component. Vacuum-insulated designs inherently avoid the leaching risks of metal-lined plastic bottles or ceramic-coated alternatives because the beverage never touches the stainless steel surface or any adhesive layer.
The brand's record and disclosure
Calpak is known primarily for luggage and travel accessories; vacuum tumblers are a secondary product line. No public record exists of recalls, safety certifications, or specific material disclosures for this model. The brand's silence on PFAS is typical for mid-tier drinkware manufacturers and does not indicate hidden use; it reflects minimal transparency culture rather than a known problem.
How it compares in its category
Vacuum-insulated tumblers are among the safest reusable drinkware options because stainless steel is chemically inert and non-leaching across normal temperature ranges. This design outperforms ceramic-coated steel (glaze-leaching risk), plastic-lined alternatives (polymer leaching risk), and uninsulated aluminum (direct leaching from acidic drinks). Calpak's 11 oz size is standard and carries no known design defects compared to competitors like Hydro Flask or YETI.
If you buy it
Wash the lid thoroughly by hand or in the top rack of a dishwasher; inspect the seal annually for cracks or degradation and replace if compromised. Avoid prolonged contact with boiling water above 195F (stainless steel vacuum seals can weaken under extreme sustained heat). Do not use solvents or abrasive scrubbers on the interior, as micro-scratches in stainless steel are rare but could theoretically harbor bacteria. Replace the lid if cracks appear in the plastic or seal; the tumbler body itself typically lasts indefinitely.
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 leaching (BPA/BPS, phthalates)
Calpak does not publicly disclose lid polymer type or BPA-free status. Risk is low because the lid contacts only the mouth and air space, not the beverage itself, but clarification of lid resin would strengthen safety profile.
Stainless steel leaching (nickel, chromium)
Food-grade stainless steel (typically 304 or 316) is highly stable and does not leach under normal use. No recalls or complaints are documented for Calpak tumblers on this basis.
Lid seal degradation and bacterial growth
If the seal gasket is not food-grade silicone or if it cracks, trapped moisture can harbor bacteria. This is a maintenance issue, not a manufacturing defect, but replacement gaskets are often unavailable for secondary brands.
Vacuum seal loss over time
Vacuum-seal integrity can degrade after 2-5 years of normal use; a compromised seal does not create a safety hazard but reduces insulation and may allow condensation inside. This is wear-and-tear, not a chemical safety concern.
Off-gassing or odor transfer from plastic components
No specific odor or VOC complaints are recorded for Calpak tumblers. Plastic lids from reputable suppliers are typically stabilized and do not off-gas at room temperature.
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.