Vacuum bottle featuring BUILT®'s "Perfect Seal" technology for leak and spill-proof lid. 17 oz. (502 mL) 18/8 double-wall Stainless Steel vacuum tumbler maintains the optimal temperature of beverages. Made of double-wall 304 Stainless Steel featuring vacuum-sealed construction. 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.