Corkcicle · Insulated Drink Tumblers
Corkcicle Canteen
Low concern. Stainless steel canteen contains no known PFAS.
Corkcicle's stainless steel canteen with cork accents avoids materials known to require PFAS. The brand has not released any PFAS statement.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel with cork detail
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Cork contamination or microbial growth
Cork trim can retain moisture and harbor mold or mildew if not dried thoroughly; this is a maintenance issue, not a manufacturing hazard. Mold growth on external cork is cosmetic and hygiene-related rather than a chemical safety concern.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Metal leaching (nickel/chromium from stainless steel)
Food-grade stainless steel (304/18-8) does not leach these metals into cold or room-temperature liquids; no established risk for this product material.
Internal coating degradation
Corkcicle canteens with powder-coat or epoxy internal finishes may chip over time with heavy use or impact. Exposure of bare stainless steel beneath is not a chemical hazard, but prolonged contact with certain acidic liquids may cause pitting; no recalls or widespread complaints exist.
Thermal shock from temperature extremes
Stainless steel canteens are thermally stable and do not release chemicals when exposed to hot or cold liquids. The cork trim is heat-safe for normal beverage temperatures but should not be used with boiling water, which may scorch cork.
The full breakdown
What it's made of and why it matters
The Corkcicle Canteen is constructed from food-grade stainless steel (typically 18/8 or 304 grade), which is chemically inert and does not leach metals into beverages under normal use. Cork is a natural bark material applied as decorative grip; it does not contact liquid directly and poses no ingestion risk. Stainless steel has lower concern for beverage container use because chromium and nickel, which are present in the alloy, remain locked in the crystalline matrix and do not migrate into cold or room-temperature liquids.
The brand's record and disclosure
Corkcicle has not published detailed material safety data or third-party certifications (such as NSF or BPA-free claims) on their product pages, though stainless steel canteens inherently do not contain BPA. The brand maintains no public record of safety controversies, recalls, or litigation related to chemical leaching. No major news coverage exists documenting health complaints tied to this product line.
How it compares in its category
Stainless steel canteens like this one are generally considered to have lower concern for chemical leaching compared to plastic or aluminum alternatives. Plastic canteens carry BPA/BPS and phthalate risks; bare aluminum can leach if not anodized; copper-lined vessels may leach copper if acidic liquids sit inside. The cork trim is a low-risk aesthetic choice compared to rubber or plastic gaskets, which may off-gas or degrade.
If you buy it
Stainless steel canteens are durable and require minimal maintenance, hand wash with mild soap and dry promptly to prevent water spotting. Do not leave acidic beverages (citrus, vinegar, wine) sitting for extended periods, as prolonged contact may cause microscopic corrosion, though risk is very low. The cork grip can absorb odors and should be kept dry to prevent mold; spot-clean with a damp cloth. Replace if the internal coating (if present) shows visible pitting or rust spots.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Corkcicle has made none
Formulations change between production runs, so check the current label. How we grade.
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Stainless steel body, powder-coat finish
Powder-coat finish degradation
Limited concern
Seal degradation and microbial growth
Limited concern
Thermal shock to seals
Limited concern
Brand PFAS statement on record, which we have not verified.
⚠Starting grade for this product type
Klean Kanteen
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Nickel leaching from stainless steel
Limited concern
Silicone lid degradation
Limited concern
Brand PFAS statement on record, which we have not verified.
⚠Starting grade for this product type
Klean Kanteen
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Powder-coat cap degradation over time
Limited concern
Bacterial biofilm in cap threads and seals
Limited concern
Thermal stress on seals at extreme temperatures
Limited concern
Brand PFAS statement on record, which we have not verified.
⚠Starting grade for this product type
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.