Zojirushi · Insulated Drink Tumblers
Zojirushi Stainless Tumbler SX-HA89H-AM
Stainless steel tumbler carries lower PFAS concern, no coating.
Zojirushi SX-HA89H-AM is a bare stainless steel insulated tumbler with no non-stick coating or water-resistant treatment applied. No PFAS-related risks are expected from the primary material.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel construction, no Teflon-family coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
Category baseline
PFAS exposure happens more often with clothing products.
No PFAS disclosure
The company has not publicly discussed PFAS in this product.
Silicone gasket degradation
The rubber or silicone seals on the lid may absorb odors or develop microbial growth if not dried thoroughly after washing; replacement gaskets are available and should be swapped every 2-3 years of heavy use.
Plastic lid or handle components
If the lid or external components contain polycarbonate or other thermoplastic polymers, they may release small amounts of unreacted monomers or plasticizers when exposed to hot liquids; specific material composition of non-metal parts is not disclosed by the manufacturer.
What’s reassuring
Uncoated safe material
Bare cast iron, stainless steel, carbon steel, or glass with no PFAS coating.
Stainless steel leaching
18/8 stainless steel does not leach measurable quantities of nickel, chromium, or iron into cold or warm beverages under normal use; acidic hot liquids (citrus, vinegar) may increase trace metal migration, but levels remain below regulatory concern.
Coating degradation (external finish)
The exterior finish (if present) is typically a powder coat or paint; this does not contact beverages and poses no ingestion risk, though scratches may expose underlying metal.
The full breakdown
What it's made of and why it matters
The Zojirushi SX-HA89H-AM is constructed from 18/8 stainless steel (austenitic grade), which is highly resistant to corrosion and does not require a Teflon-family coating or ceramic interior coating to function safely. Uncoated stainless steel does not leach significant metals into food or beverages under normal use conditions, as the steel's chromium oxide passive layer protects against dissolution. This design eliminates common risks associated with degrading coatings or Teflon-type coating fume release from heat exposure.
The brand's record and disclosure
Zojirushi is a Japanese manufacturer with a well-established reputation for product quality and safety standards; the brand is ISO 9001 certified and regularly conducts safety testing on food-contact materials. No significant recalls or safety controversies are on public record for this product line. The brand does not publicly disclose detailed PFAS or chemical testing data, though this is standard for most tumbler manufacturers; the uncoated stainless steel design itself suggests a lower-risk approach to product formulation.
How it compares in its category
This tumbler sits at the safer end of the insulated drinkware spectrum because it avoids synthetic coatings entirely, unlike many competitors that use polyester or acrylic outer jackets or internal Teflon-type coating liners. Most insulated stainless steel tumblers in this price range (typically $30-60 USD) rely on similar uncoated construction, making Zojirushi a conventional choice rather than an outlier. The main differentiation is in insulation quality and lid design rather than chemical safety.
If you buy it
Hand wash the tumbler rather than placing it in the dishwasher to preserve any external finishes and rubber seals over time. Do not fill with boiling liquid immediately after opening, as the temperature differential can stress the seal interface; allow liquid to cool slightly before sealing. Replace the silicone gasket on the lid if it becomes visibly degraded or develops odor, as this is the only consumable component prone to wear. The stainless steel body itself should remain safe indefinitely with routine cleaning.
What we don’t know
- Basis
- Model estimate, 87% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Zojirushi has made none
Formulations change between production runs, so check the current label. How we grade.
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.