Simple Modern · Insulated Drink Tumblers
Simple Modern OSU Vacuum Insulated Stainless Steel Tumblers
Low concern. Bare stainless steel has no typical PFAS-containing coatings.
Stainless steel tumblers lack the nonstick and water-repellent treatments where PFAS are typically found. Simple Modern hasn't released PFAS information, though the material itself poses minimal fluorochemical risk.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel and vacuum insulation
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What Simple Modern OSU Vacuum Insulated is made of, ingredients and materials
This tumbler uses food-grade 18/8 stainless steel as the inner and outer walls with a vacuum-sealed air gap for insulation. Stainless steel is chemically stable and does not leach metals under normal use because the chromium oxide layer on its surface resists corrosion. Unlike ceramic-lined or polymer-coated tumblers, bare stainless steel avoids glazes, enamels, or synthetic coatings that can degrade or shed contaminants.
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.
Lid and gasket materials (polymer)
The tumbler lid and sealing gaskets are typically plastic or rubber compounds not specified publicly by Simple Modern. These components could potentially off-gas or leach if made from lower-grade polymers, though modern beverage lids are usually food-safe approved.
Vacuum seal degradation
Repeated thermal stress or dishwasher use can eventually compromise the vacuum seal, but this affects function (insulation loss) rather than chemical safety. Once failed, the tumbler can still be used as a regular drinking vessel.
What’s reassuring
Bare uncoated material
Recorded as a bare, uncoated material with no surface coating or treatment.
Stainless steel nickel content
18/8 stainless steel contains ~8% nickel, which is bound within the metal and does not leach under normal drinking conditions. Nickel allergy risk is negligible for this application.
Coating or finish on exterior/base
Simple Modern tumblers typically feature bare stainless steel exteriors with minimal powder coat or paint; no published reports of coating degradation or contaminant release. The OSU branding is printed rather than applied as a heavy coating.
The full breakdown
The brand's record and disclosure
Simple Modern does not publicly disclose detailed material sourcing or third-party safety testing on their website. No significant safety recalls or documented safety controversies have been published for this brand's drinkware line. The company markets their products as suitable for hot and cold beverages but provides limited transparency on manufacturing standards or chemical testing beyond material type.
How it compares in its category
Stainless steel tumblers have lower concern than reusable drinkware options that use plastic polymers (BPA, phthalates), ceramic glazes (lead/cadmium risk), and coatings prone to degradation. Most competitors in the vacuum-insulated tumbler market use similar 18/8 stainless steel construction, so this product is functionally comparable to other major brands in safety profile. The main differentiation is brand reputation and lid/seal materials rather than core material risk.
If you buy it
Hand wash or check that your dishwasher temperature stays below 140F to avoid potential damage to the vacuum seal over years of use. Inspect the lid seal and rubber gaskets periodically for cracks or degradation, as these are polymer components that may need replacement. Avoid denting the steel body, which could compromise vacuum insulation. The stainless steel itself is durable and does not degrade from acidic beverages or repeated heating/cooling cycles.
What we don’t know
- Basis
- Model estimate, 82% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Simple Modern has made none
Formulations change between production runs, so check the current label. How we grade.
Better-graded alternatives in Insulated Drink Tumblers
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- 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. See all of them.
Klean Kanteen
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- 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. See all of them.
Klean Kanteen
Insulated TKWide Cap
- 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. See all of them.
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.