The Contigo West Autoseal travel mug is a stainless steel vacuum flask, perfect for hot and cold drinks while out and about, or near electrical items such as laptops, where spillage would be a problem. With a generous capacity of 470ml, the mug features an easy to clean lid made from BPA-free plastic. This leak-proof tumbler is supplied in a sleek matte black finish with stainless steel interior and embellishment around the button. Keeping drinks hot for up to five hours and cold for up to twelve hours, the Contigo West travel mug is 100% spill-proof and the convenient button lock provides added security. Autoseal Technology for on-the-go spill-proof and leak-proof confidence Push button to drink and release to automatically seal the lid One-handed operation offers optimal on-the-go experience Thermalock double-wall, vacuum insulation Easy to clean lid, one piece lid Ergonomic curved shape Button lock for added security Lid is top-rack dishwasher safe, body is hand wash only L