Thermos Guardian Collection Tumbler

The double-wall vacuum insulation is designed to keep beverages hot for up to 5 hours or cold for up to 14 hours. Performance can vary slightly based on the starting temperature of your drink and how often you open the lid.

The slide lock lid is leak-resistant, meaning it is designed to prevent spills during standard use and transport. While it is secure enough for a commute, it is not fully leak-proof, so we recommend keeping it upright rather than tossing it loosely into a bag.

Yes, the Guardian Collection Tumbler is top-rack dishwasher safe. This makes cleaning straightforward, though hand washing occasionally can help preserve the powder-coated finish for longer.

The tumbler features a slim profile specifically engineered to fit most standard vehicle cup holders. It should sit securely in the vast majority of modern car consoles.

No, the double-wall vacuum insulation prevents condensation from forming on the outside of the tumbler. You can set it on a desk or table without worrying about water rings.

No, this tumbler is made of stainless steel and should never be placed in a microwave. Doing so can cause damage to the vessel and your appliance.