Zojirushi · Insulated Drink Tumblers
Zojirushi GoCafe Insulated Mug
Low concern, but the brand doesn't disclose interior coating details.
Zojirushi's stainless steel mug with plastic lid and inner coating uses standard materials, though the brand doesn't specify the interior thermal coating's composition.
We flunk more products than we pass. This one earned its grade. How we grade
Material
stainless steel body, plastic lid and interior coating
Lab data
No public lab test
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What Zojirushi GoCafe Insulated Mug is made of, ingredients and materials
The GoCafe uses a stainless steel exterior body, which is chemically inert and does not leach metals under normal use. The interior is lined with a polymer coating (likely epoxy or polyester-based) applied to the steel, and the lid is polypropylene or similar food-grade plastic. The coating is the weakest link, if it degrades or chips, it may expose steel and accelerate corrosion, though stainless steel itself resists rust. The plastic lid can off-gas volatile compounds at high temperatures, but routine hot beverage use (below 180F) keeps exposure minimal.
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.
Interior polymer coating degradation
The epoxy or polyester interior coating can chip or peel with thermal cycling and abrasive cleaning. If breached, exposed steel may corrode and shed particles; Zojirushi does not publicly detail coating composition or expected lifespan, limiting risk assessment.
Plastic lid off-gassing (volatile organics)
The polypropylene or similar plastic lid may release trace volatile compounds when in contact with hot liquids above 160F. Risk is low at typical beverage temperatures (120-160F) but increases with near-boiling fill and repeated hot use.
Seal material (gasket) degradation
The lid gasket is typically silicone or rubber and can degrade, crack, or harbor bacterial growth if not cleaned regularly. This is a maintenance issue rather than a manufacturing hazard, but users should replace gaskets if visibly worn or if seal performance drops.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Stainless steel seam or joint corrosion
Zojirushi GoCafe uses welded stainless steel construction, which resists corrosion. No recalls or complaints of rust or nickel leaching are on record for this product line under normal use.
Heavy metals
Food-grade stainless steel (typically 304 or 316) contains iron, chromium, and nickel. Migration to beverages is negligible under normal pH and temperature conditions; no documented cases of nickel or chromium leaching from Zojirushi insulated mugs exist.
Source, FDA ↗How is this PFAS grade calculated?
The brand's record and disclosure
Zojirushi publishes some material safety data but does not publicly disclose the specific chemistry of interior coatings across its product line, which is common in the drinkware industry but limits independent verification. The brand has no documented major recalls or safety violations specific to this product line. No third-party certifications (e.g., NSF, BPA-free claims) are prominently advertised for the GoCafe, suggesting the brand relies on standard food-contact material regulations rather than voluntary testing.
How it compares in its category
Insulated mugs with stainless steel bodies and plastic lids are the standard in this category; the GoCafe is representative. Single-wall ceramic or borosilicate alternatives avoid polymer coatings but offer less insulation and higher breakage risk. Premium alternatives sometimes include removable stainless steel liners or ceramic coatings, which reduce coating uncertainty but cost more. The GoCafe positions itself as mid-market, adequate insulation, durable materials, and no known safety gaps, though transparency lag behind some competitors.
If you buy it
Inspect the interior coating before first use for cracks or chips; replace if damaged. Avoid prolonged contact with acidic beverages (citrus, vinegar) which may accelerate coating wear over years of use. Do not fill with boiling water repeatedly; limit to 160-180F drinks to reduce plastic lid off-gassing. Hand-wash rather than dishwasher to preserve coating integrity. Replace the lid every 2-3 years if cracks appear or seal performance drops, as the lid is the most replaceable wear component.
What is not known about PFAS in this product?
- Basis
- Model estimate, 72% 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 GoCafe Insulated Mug?
- 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.