Is Thermos Stainless King dishwasher safe?
Not dishwasher safe
No, the Thermos Stainless King is not dishwasher safe.
Quick facts
| Dishwasher safe? | No — Not dishwasher safe |
|---|---|
| Category | Drinkware |
| Source | Researched — confirmation in progress |
| Last checked | 2026-06-17 |
Why
The vacuum insulation and double-wall construction can be damaged by the high heat and harsh detergents in dishwashers, leading to loss of thermal performance. Additionally, the lid contains seals and components that may degrade or leak.
How do you wash Thermos Stainless King?
Hand wash with warm soapy water and a soft sponge. Rinse thoroughly and air dry with the lid off.
More drinkware
Last updated 2026-06-17. General guidance — always check your product’s care label. How we verify.