This highly rated insulated travel mug can keep beverages warm for 6 hours or refrigerated for 12 hours. The strong coffee bottle will not crack or rust. Whether you are working in an office or camping outdoors, your stainless steel insulated bottle will provide a pure, metal-free taste without retaining or changing the flavor. Stylish thermos travel mug at work, school, travel or car because it fits most vehicle cup holders. There is a traditional snap on coffee cup lid opening on one side for sipping hot and cold beverages. On the other side, you can sip easily without tilting the cup. Both lid openings have lid for splash-proof travel. The water bottle lid is buckled and the straw lid is locked in place.