When you need your coffee hot or your water cold, look no further than the Thermos 18 oz. Vacuum Insulated Stainless Steel Mug. It is equipped with a slide lock lid so you can enjoy warm or cold beverages throughout your day. The slide lock lid is leak-resistant when closed and straw compatible when open to enjoy cold beverages (straw not included). From the Thermos vacuum insulation technology, to the Griptec molded handle and non-slip base, this mug is truly iconic. It also features a Lumiview Lid that provides a clear view of the contents. No detail has been left behind! Features: Vacuum insulation keeps drinks hot for up to 5 hours or cold for up to 20 hours. Durable 18/8 stainless steel. Lumiview Lid provides a clear view of contents. Griptec molded handle and non-slip, quiet, soft-touch base. Fits most car cup holders. Top-rack dishwasher safe.