Made of double-wall 304 Stainless Steel featuring vacuum-sealed construction;Vacuum bottle featuring BUILT®'s exclusive "Perfect seal" technology for leak and spill-proof lid; 17 oz (502 mL) 18/8 double-wall stainless vacuum tumbler maintains the optimal temperature of beverages; Patented Tritan™ plastic and Silicone lid twists to the left to unlock and open; To close push down and twist to right to lock; Keeps your drinks cold or warm longer than a traditional tumbler; Hand wash only Do not place in freezer; BPA-free; Fits in most standard sized cup holders; Patented, US 9,422,089 B2; Product Size: 3.19" w x 10.4" h x 3.19" d x 2.56" dia.;