Starts cold. Stays cold. The Thermos 40oz Stainless Steel Cup Holder Mug will keep you hydrated to take on the day. From work, to errands, to practice, this is the perfect mug to take with you on the go, as it fits in most standard size cup holders. From the Thermos vacuum insulation technology, to the slide lock lid, and the Griptec non-slip base and handle, we’ve got you covered. Also equipped with a Lumiview lid to provide a clear view of the contents and a straw gasket that is leak resistant when the slider is closed. The lid and straw are ultra clear, reusable, and easy to clean. Dishwasher safe (top rack dishwasher safe for added convenience).