When it's made by Thermos®, you know performance comes standard. This Stainless KingTM Travel Mug is no exception. ThermosTM vacuum insulation technology keeps beverages hot for up to 7 hours, or cold for up to 18. Topped with a DrinkLockTM sealing lid that operates with a simple touch. Just slide lid tab for easy open/close. And the lid features a built-in hook to secure a tag bag, or a loose leaf tea infuser for easy brewing on the go. Constructed with double-wall stainless steel and a sturdy handle that'll keep up with your adventurous life.