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

Contigo

Byron 2.0 Stainless Steel Travel Mug Snapseal

Stainless steel, silicone gasket

A
B
PFASAll
A · Very low PFAS3 flags

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

Thermos

Stainless Steel Tumbler Slide Lock Lid

Stainless steel body, plastic/silicone lid

A
B
PFASAll
A · Very low PFAS2 flags

Lower concern. Stainless steel core is PFAS-free; lid material unclear.

Bare metal or glass, no coating at all

16oz Insulated Hot Tumbler

Calpak

16oz Insulated Hot Tumbler

Stainless steel exterior, plastic/silicone interior

B
D
PFASAll
B · Low PFAS4 flags

Lower concern. Stainless steel tumbler with no known PFAS-prone treatments.

Brand says nothing about PFAS

Contigo Luxe Travel Mug

Contigo

Luxe Travel Mug

Stainless steel body with silicone lid gasket and rubber base; lid likely includes leak-proof coating

F
F
PFASAll
F · High PFAS4 flags

Stainless steel core lower concern; waterproof gaskets pose moderate PFAS uncertainty.

Waterproof or stain-proof treatment

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