Zojirushi · Insulated Drinkware Tumblers
Zojirushi Stainless Steel Vacuum Insulated Tumbler 0.72L
Stainless steel construction poses lower PFAS concern. No disclosure needed.
Zojirushi vacuum tumblers use stainless steel bodies without known PFAS-bearing coatings or treatments. Brand does not disclose PFAS status, but material type suggests lower risk profile for typical use.
Shop Zojirushi on Amazon →Material
Stainless steel with vacuum 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
This tumbler uses food-grade stainless steel (typically 18/8 or 18/10 austenitic steel) as the primary contact surface, which is highly resistant to corrosion and leaching across normal use temperatures. The vacuum insulation between double walls is an air gap (not a chemical foam), eliminating off-gassing concerns common in some thermal containers. Stainless steel does not require polymer coatings, glazes, or enamel finishes that could degrade or leach harmful compounds over time.
The brand's record and disclosure
Zojirushi has a established reputation for quality small appliances and drinkware, with no public product recalls or safety violations on record for this tumbler model. The brand does not proactively disclose PFAS testing or certification, consistent with most stainless steel drinkware manufacturers; however, stainless steel construction itself carries inherently lower PFAS risk compared to coated or polymer-based alternatives. No major controversies or warning letters from regulatory agencies are documented for Zojirushi drinkware.
How it compares in its category
Stainless steel tumblers are among the safest drinkware options available, outperforming plastic, ceramic, or coated aluminum alternatives in terms of leaching risk and durability. This product sits in the mid-to-premium tier; comparable models from Hydro Flask, S'well, and Contigo use similar stainless steel construction with equivalent safety profiles. The vacuum insulation design avoids the risk of internal coating failure seen in some cheaper thermal containers.
If you buy it
Hand wash rather than dishwasher to preserve the rubber gasket and cap seals, which can degrade if exposed to sustained heat. Avoid filling with liquids above 60C (140F) repeatedly, as extreme thermal cycling may eventually compromise the vacuum seal. Replace the lid or gasket if cracks or permanent deformation appear. Store dry and empty when not in use to prevent mineral buildup from tap water inside the vacuum chamber.
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 corrosion and nickel leaching
Low-quality stainless steel or damage to the surface can permit minimal nickel release in acidic beverages (citrus, vinegar, wine). Food-grade 18/8 steel in this product class is resistant but not immune; integrity matters. Risk is negligible for most users but relevant for those with nickel sensitivity.
Gasket and cap material degradation
Rubber gaskets and silicone seals in Zojirushi tumblers can crack or degrade with age and repeated dishwasher exposure. No chemical leaching from gaskets has been documented, but physical failure can compromise the seal and allow water ingress into the vacuum space.
Thermal shock and double-wall separation
Rapid temperature extremes (hot liquid immediately followed by submersion in ice water) can theoretically stress the seal between inner and outer walls. Long-term consequence is loss of insulation rather than chemical hazard, but rarely reported in this product line.
Coating or paint on exterior
Zojirushi stainless steel tumblers typically have minimal exterior coating; powder coat or paint, if present, is not in contact with beverage and poses no ingestion hazard under normal use. No recalls or complaints on record.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 82% 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.