RTIC · Insulated Drink Tumblers
RTIC 20 oz Tumbler
Lower concern. Stainless steel tumbler unlikely to contain PFAS.
RTIC 20 oz tumblers are stainless steel with vacuum insulation, materials inherently unlikely to require PFAS. Brand provides no PFAS disclosure, but product design presents minimal PFAS risk.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel exterior, vacuum-insulated
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 RTIC 20 oz tumbler uses 18/8 food-grade stainless steel (the exterior shell) with a vacuum-insulated interior, typically a stainless steel inner wall or similar inert material. Stainless steel is chemically stable and does not leach heavy metals or break down into microplastics under normal use or repeated dishwashing. The vacuum seal itself contains no known hazardous gases; it is simply air at low pressure.
The brand's record and disclosure
RTIC (Rugged Thermal Insulated Containers) does not publish detailed material safety data sheets or third-party certifications (e.g., BPA-free claims, heavy metal testing). The brand maintains a largely silent stance on chemical compliance beyond standard food-contact material compliance. No major recalls or safety controversies involving the 20 oz tumbler have been documented in public records or media. The product is sold as a general-purpose drinkware item without premium certification.
How it compares in its category
Vacuum-insulated tumblers in this price range (RTIC, Yeti, Ozark Trail) share similar stainless steel construction and pose comparable hazard profiles. RTIC tumblers lack the third-party transparency some competitors offer (e.g., some Yeti products cite NSF certification); however, the core material risk is equivalent. Stainless steel tumbler hazards are overall lower than those of insulated plastic drinkware or ceramic-coated alternatives.
If you buy it
Hand-wash or use gentle dishwasher cycles to preserve any interior coating and seals over time. Do not expose to extreme heat (boiling water is safe, but prolonged heating above 60°C is unnecessary and may degrade gaskets). Replace the tumbler if the seal fails, allowing moisture into the vacuum layer, as this indicates structural compromise. Store dry when not in use to prevent bacterial growth in the seal area.
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.”
Stainless steel leaching (chromium, nickel)
18/8 food-grade stainless steel is highly resistant to corrosion and does not leach detectable chromium or nickel under normal beverage storage. No recalls or reports of leaching from RTIC tumblers are on record.
Gasket/seal degradation and off-gassing
The vacuum tumbler's rubber gaskets and seals (typically silicone or synthetic rubber) can degrade with age and repeated hot-water exposure. Off-gassing of volatile organics from degraded seals is theoretically possible but uncommon in stainless steel tumblers; replacement seals/lids are readily available.
Bacterial growth in seal cavities
Water or beverage residue trapped in the lid gasket or seal area can harbor bacteria if the tumbler is not dried promptly after cleaning. This is a maintenance issue, not a material hazard, and is mitigated by regular hand-drying and air circulation.
Interior coating unknown
RTIC does not disclose whether the inner stainless steel surface has a coating (e.g., epoxy, food-grade lacquer). If a coating is present, its composition is not publicly documented, though major hazards (lead, cadmium) are unlikely in a US-marketed food-contact product.
Microplastics from lid or interior wear
The tumbler body is stainless steel and will not shed microplastics. The plastic lid (if included) is a secondary component and is not designed to contact hot liquids for extended periods; no reports of plastic degradation or microplastic shedding from RTIC lids are on record.
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.
Safer alternatives in Insulated Drink Tumblers
Reduce
Halo Tumbler
Stainless steel and plastic lid
Lower concern tumbler; stainless steel is inherently PFAS-safe.
✓Naturally PFAS-free material
Cuppa
To Go Tumbler
Stainless steel with plastic lid
Lower concern. Standard tumbler with no known PFAS risks.
✓Naturally PFAS-free material
Klean Kanteen
Steel Pint
18/8 stainless steel, bare metal
Lower PFAS concern. Bare stainless steel container, no coatings.
✓Bare metal or glass, no coating at all
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.