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.