The 20-ounce YETI Rambler, is a must have classic. Its made from durable, 18/8 food-grade stainless steel. With a double wall vacuum insulation construction, its designed to keep your drink colder or warmer for longer. The tumbler features a MagSlider lid, that acts as a barrier to accidental spillages, as well as helping to retain heat or the cold. Its finished with an oleophobic coating, that will keep it fingerprint free too.