Corkcicle · Insulated Travel Drinkware
Leakproof Cruiser Insulated Tumbler with Handle
Lower concern. Stainless steel and silicone, no Teflon-family coating risk apparent.
Corkcicle insulated tumblers use stainless steel construction with silicone seals, not known PFAS-prone materials. Brand provides no PFAS disclosure, but product design lacks typical Teflon-family coating coatings.
Shop Corkcicle on Amazon →Material
Stainless steel body, silicone gasket
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
The Corkcicle Cruiser uses a stainless steel outer body, which is chemically inert and does not leach metals under normal use conditions. The silicone gasket (lid seal) is a food-grade elastomer that does not contain BPA, BPS, or phthalates in typical formulations. Stainless steel and silicone are among the safest food-contact materials available and do not require surface coatings that might degrade or release toxins over time.
The brand's record and disclosure
Corkcicle has not publicly disclosed detailed chemical testing or third-party certifications for heavy metals or migration limits on this specific product. The brand maintains silent stance on PFAS, which is typical for tumbler manufacturers but limits transparency. No recalls specific to this model have been documented in public safety databases; the brand's general reputation centers on design and insulation performance rather than chemical safety communication.
How it compares in its category
Insulated tumblers made from stainless steel represent a lower-risk category compared to plastic-lined or ceramic-lined alternatives, which carry potential BPA, microplastic, or glaze-contamination concerns. Corkcicle's stainless steel construction is comparable to hydro-flask and yeti models in material safety profile. The silicone gasket is standard across premium tumblers and poses no known risks when kept clean and replaced if visibly degraded.
If you buy it
Hand wash the silicone gasket regularly to prevent bacterial biofilm buildup in the seal; do not place in the dishwasher if the manufacturer advises against it, as high heat and detergent can accelerate gasket aging. Replace the gasket every 1-2 years if it becomes sticky, discolored, or develops odor. Avoid prolonged storage of acidic beverages (citrus, vinegar) in direct contact with the stainless steel, as salt and acid can initiate corrosion over many months. Do not use abrasive scrubbers on the interior, as this does not damage safety but can leave residue.
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 gasket degradation and bacterial growth
If the silicone gasket is not removed and dried after each use, or if stored damp, mold or bacteria can colonize the seal. This is a hygiene risk rather than a chemical toxicity risk, but is the most common maintenance failure point for tumblers with silicone seals.
Stainless steel corrosion and surface leaching
Food-grade stainless steel (typically 18/8 or 18/10 alloy) does not leach nickel, chromium, or other metals under normal drinking use. Prolonged exposure to highly acidic or salty conditions can initiate surface corrosion, but leaching into beverage is not established as a hazard at typical exposure levels.
Insulation material (foam or air-gap) off-gassing
Corkcicle does not publicly disclose the insulation composition (typical options are closed-cell foam or vacuum-sealed air). No volatile organic compound (VOC) or formaldehyde off-gassing has been reported for this model. The insulation does not contact the beverage and poses minimal inhalation exposure risk.
Heavy metals in lid coating or embellishments
If the lid includes a painted logo or metallic coating, there is a theoretical risk of lead or cadmium in paint, though this is not specific to Corkcicle and has not been documented as a problem. The plastic or powder-coated lid should not contact the beverage directly.
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.
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More insulated travel drinkware 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.