Corkcicle · Insulated Travel Drinkware
Corkcicle Sport Canteen
Lower concern. Stainless steel drinkware with standard insulation.
Sport Canteen uses stainless steel construction, inherently PFAS-free. No Teflon-family coating or specialized water-repellent coating typical of PFAS risk. Brand silent on PFAS but material profile is lower concern.
Shop Corkcicle on Amazon →Material
stainless steel with non-Teflon-type coating insulation
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 Sport Canteen uses food-grade stainless steel (typically 18/8 or 304 grade) for the outer and inner walls, which is chemically inert and does not leach heavy metals or BPA into beverages. The insulation layer between the walls is a standard closed-cell foam or polyurethane material (non-Teflon-type coating, per specification), which is sealed and does not contact the liquid you drink. Stainless steel is one of the safest drinkware materials because it resists corrosion, does not degrade with acidic or hot liquids, and has no known coating degradation risks.
The brand's record and disclosure
Corkcicle has not published detailed material safety data sheets or certifications (BPA-free claims, FDA compliance statements) in widely accessible public sources, though the company markets products as suitable for food and beverage use. No major recalls or safety controversies involving this product line have been documented in public safety databases. The brand's silence on PFAS use in insulation foaming or manufacturing is typical of the drinkware industry, where disclosure remains voluntary and inconsistent.
How it compares in its category
The Sport Canteen is comparable to Hydro Flask, S'well, and Klean Kanteen in material safety; all use stainless steel construction and closed-cell insulation. Unlike some budget drinkware, there is no reported lead in seams or enameled coatings. The main differentiator is aesthetic and durability, not chemical safety; the non-Teflon-type coating insulation is a minor positive versus older nonstick-foam designs, though the practical safety gain is marginal since insulation is not in contact with contents.
If you buy it
Wash by hand or in the top rack of a dishwasher to preserve the exterior coating; avoid prolonged exposure to extreme heat (do not autoclave or use in an oven). Stainless steel is durable and will not leach under normal use; you do not need to replace it unless dents or the seal fail. Do not submerge the cap or lid seals for extended periods, as non-metal components may degrade over years. Avoid abrasive scrubbers that may scratch the stainless steel surface, though scratches do not create safety risks.
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.”
Insulation material off-gassing (VOCs)
Closed-cell foam or polyurethane insulation can release trace volatile organic compounds during manufacturing or initial use. No specific off-gassing data for Corkcicle products is publicly available; exposure is minimal once sealed and cured, and risk is lower than for open-cell foams.
Cap or lid seal material degradation
Non-stainless-steel components (silicone gaskets, plastic seals) may degrade or harbor bacteria if not cleaned regularly. This is a maintenance issue rather than a toxicity hazard, but repeated hot-water washes can shorten seal lifespan.
Heavy metals in stainless steel welds or seams
Food-grade 304 stainless steel used in reputable drinkware does not contain added cadmium or lead. Welded seams meet FDA standards for food contact. No recalls or test reports suggesting leaching from this product.
Bacterial growth in insulation or seams
If the seal deteriorates or liquid seeps into the insulation layer, stagnant moisture can support mold or bacteria growth. This is a maintenance and design risk, not a chemical hazard; prevent by proper cleaning and drying.
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.
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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.