x4 RecPro 20oz Vacuum Insulated Tumbler 18/8 Stainless Steel w/Slider Lid 20oz. capacity double wall vacuum insulation keeps your hots HOT and your colds COLD BPA-Free open/close slider lid with straw slot Made of food safe, rust-proof 18/8 Stainless Steel Comes in a retail box with reusable storage bag Performs like the high priced tumblers for a fraction of the cost