Zojirushi · Insulated Drink Tumblers
Zojirushi SX-FSE45AD Stainless Vacuum Insulated Tumbler
Stainless steel body with no coating on record linked to PFAS.
This tumbler has a stainless steel body and glass or plastic inner walls with no water-repellent finish on record. The brand has no PFAS statement on record for this product.
We flunk more products than we pass. This one earned its grade. How we grade
Material
stainless steel body, glass or plastic inner walls
Lab data
No public lab test
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What Zojirushi SX-FSE45AD Stainless Tumbler is made of, ingredients and materials
The SX-FSE45AD features a stainless steel outer shell with either borosilicate glass or food-grade plastic inner walls (models vary by region; check yours). Stainless steel is chemically stable and does not leach into beverages under normal use. The vacuum insulation layer between walls is typically air or inert gas, not a chemical additive of concern. This design avoids aluminum direct contact with liquids and eliminates nonstick coatings that could degrade.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
Plastic liner degradation (if applicable)
Some regional versions use food-grade plastic (likely PP or copolyester) instead of glass. Prolonged exposure to hot liquids or repeated thermal stress may cause microscopic plastic particles to enter beverages after years of use, though risk is low with normal cold/tepid use.
Rubber/silicone seal breakdown
Lids contain elastomer gaskets that can absorb odors, harbor bacteria if not cleaned weekly, and degrade after 2-3 years. Degradation itself is not a leaching hazard but compromises the vacuum seal, reducing insulation and potentially allowing mold growth in the cavity.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Heavy metals
Food-grade stainless steel (typically 18/8 or 18/10 alloy) is required by law in most regions and does not leach nickel, chromium, or manganese into beverages under normal pH and temperature. No recalls or reports of this issue with Zojirushi tumblers on record.
Source, FDA ↗Borosilicate glass integrity (if glass liner)
If this model uses borosilicate glass, it is thermally stable and does not leach silica or barium under normal use. Risk of breakage on impact is mechanical, not chemical; no contamination hazard if glass fractures unless sharp fragments enter beverage.
Coating adhesion or off-gassing
Zojirushi does not use Teflon-type coating or nonstick interior coatings on this model line. The stainless exterior may have a thin cosmetic powder coat or paint, which poses no food-contact risk due to physical distance from beverage chamber.
How is this PFAS grade calculated?
The brand's record and disclosure
Zojirushi is a Japanese appliance manufacturer with a 100-year history and strong reputation for food-safety compliance in North America, EU, and Japan. The company does not publicly trumpet PFAS-free claims but maintains ISO certifications for food-contact materials and has no documented recalls linked to chemical leaching. Limited transparency on full material sourcing, but no substantive controversies in peer or regulatory records regarding this product line.
How it compares in its category
This tumbler is among the safer vacuum-insulated drink containers because stainless steel + glass/plastic inner avoids common hazards in cheaper models (e.g. lead in ceramic glazes, Teflon-type coating degradation). Comparable brands like Contigo and Hydro Flask use similar designs; Zojirushi's build quality and lack of chemical coatings place it in the lower-risk segment. Price reflects durability rather than premium material sourcing claims.
If you buy it
Hand-wash only if the model has a removable plastic lid or seal; the stainless steel body can go in dishwasher but seals may degrade. Do not use for hot liquids above 60-65C (140-150F) for extended periods if it has a plastic inner liner, as prolonged heat can increase microscopic plastic shedding over years. Replace rubber or silicone gaskets every 2-3 years if they show cracks or discoloration. Do not store acidic beverages (vinegar, citrus) for days at a time in plastic-lined versions, as acids can slightly soften polymer over time.
What is not known about PFAS in this product?
- Basis
- Model estimate, 78% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Zojirushi has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Zojirushi SX-FSE45AD Stainless Vacuum Insulated Tumbler?
- Stainless steel bottle, stainless steel cap
- The brand calls it PFAS-free, which we have not verified
- Powder-coat cap degradation over time
3 hazards checked on this product, all on its full breakdown.
- Stainless steel body, powder-coat finish
- The brand calls it PFAS-free, which we have not verified
- Powder-coat finish degradation
3 hazards checked on this product, all on its full breakdown.
- Stainless steel bottle, plastic cap and silicone gasket
- The brand calls it PFAS-free, which we have not verified
- Silicone gasket degradation and leaching
3 hazards checked on this product, all on its full breakdown.
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.