Zojirushi · Insulated Drink Tumblers
Zojirushi Stainless Carry Tumbler with Pop-up Straw
Lower concern; stainless steel and standard plastics unlikely PFAS sources.
Zojirushi's stainless steel tumbler uses inherently PFAS-resistant materials. No brand disclosure on PFAS exists, but the product design presents minimal known risk.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel tumbler body, plastic pop-up straw
Lab data
No public lab test
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What Zojirushi Stainless Carry Pop-up Straw is made of, ingredients and materials
The tumbler body is food-grade stainless steel (typically 18/8 or similar), which is chemically inert and does not leach metals into beverages under normal use. The pop-up straw is injection-molded plastic, likely polypropylene or acetal copolymer, both approved food-contact materials in the US and EU. The lid and internal gasket components are also plastic and metal, standard for insulated drinkware. Stainless steel tumblers are not a material linked to PFAS concerns in beverage containers.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Plastic straw degradation and microplastic release
The pop-up straw is the only plastic component in direct contact with beverages. Repeated heating cycles or acidic drinks (citrus, vinegar) may cause minor surface cracking over years of use, potentially releasing microplastic fragments. No recalls for this model have been documented, but this is a material-class risk inherent to any plastic drinking straw.
Gasket and seal leachables
Silicone or elastomer gaskets in the lid may release trace organic compounds if exposed to prolonged heat or alcohol-based beverages. This is a design-level risk common to all reusable tumblers and not specific to Zojirushi; severity is minimal under normal use (cold or warm water, occasional hot beverages).
Bacterial growth in straw mechanism
Pop-up straws have crevices and joints that can trap moisture and food residue if not thoroughly dried after washing. Regular hand washing and air drying are essential; failure to do so may create conditions for bacterial or mold growth inside the straw housing, though the risk is behavioral rather than chemical.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Stainless steel nickel content migration
Food-grade stainless steel (18/8) contains nickel but migration into beverages at room or warm temperature is negligible. No testing data specific to this Zojirushi model has been published; however, stainless steel tumblers are not considered a nickel exposure concern in scientific literature.
Coating or plating on metal components
If internal springs or small metal parts in the pop-up mechanism use nickel plating or other coatings, minimal contact with beverages occurs. No recalls or safety data suggesting coated hardware leaching in this product line have been identified.
How is this PFAS grade calculated?
The brand's record and disclosure
Zojirushi is a Japanese brand with a long history in thermal products and has not faced major product safety recalls or chemical contamination scandals in the US market. The company does not publicly disclose detailed material sourcing or PFAS testing results, which is typical for this product category but represents a gap in transparency. No certifications specific to chemical-free manufacturing have been identified, though the brand maintains ISO quality standards.
How it compares in its category
Insulated tumbler options range from stainless steel (not a material linked to PFAS) to vacuum-sealed plastic or silicone-wrapped models. This Zojirushi tumbler has lower concern because the primary contact surface is stainless steel rather than plastic or coated aluminum. Pop-up straws are a convenience feature common across mid-range and premium tumblers; quality varies but this design is not known to introduce additional chemical risks compared to fixed or reusable straws.
If you buy it
Hand wash the straw and lid after each use, as dishwashers can degrade plastic components over time and create odor retention. Do not fill with boiling water immediately before sealing the pop-up mechanism, as thermal stress may warp the plastic straw housing. Replace the straw or gaskets if cracking or discoloration appears. The stainless steel body is durable; monitor the lid seal after 1-2 years of regular use, as gasket compression is the most common wear point.
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 Stainless Carry Tumbler with Pop-up Straw?
- Stainless steel bottle, stainless steel cap
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- 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.