Silicone Insulated Drinkware Tumblers, ranked by PFAS safety
All 4 platinum and food-grade silicone in our insulated drinkware tumblers database, graded A to F and ranked safest first. 3 earn a buy-worthy grade.
Contigo
Byron 2.0 Stainless Steel Travel Mug Snapseal
Stainless steel, silicone gasket
Travel mug with lower PFAS concern; stainless steel typically safe.
✓Bare metal or glass, no coating at all
Thermos
Stainless Steel Tumbler Slide Lock Lid
Stainless steel body, plastic/silicone lid
Lower concern. Stainless steel core is PFAS-free; lid material unclear.
✓Bare metal or glass, no coating at all
Calpak
16oz Insulated Hot Tumbler
Stainless steel exterior, plastic/silicone interior
Lower concern. Stainless steel tumbler with no known PFAS-prone treatments.
⚠Brand says nothing about PFAS
Contigo
Luxe Travel Mug
Stainless steel body with silicone lid gasket and rubber base; lid likely includes leak-proof coating
Stainless steel core lower concern; waterproof gaskets pose moderate PFAS uncertainty.
⚠Waterproof or stain-proof treatment
See every material: all insulated drinkware tumblers grades →