BYO 5212988 Double Wall Stainless Steel Vacuum Insulated Tumbler in Metallic Gunmetal is designed with a slim look that fits in most standard cup holders. Built with a 18/8 stainless steel， vacuum-sealed construction that will never sweat or be hot to the touch. Maintains the optimal temperature of hot and cold beverages allowing the cool contents to remain cool for up to 24 hours and warm and hot liquids for up to 6 hours. Designed to be used with one hand. Lid of the tumbler is constructed out of threadless and transparent Tritan with technology that is designed to be leak and spill proof and easily slides open and closed. 20 oz capacity. Hand wash. Food and Lead Safety tested and PVC， BPA， latex and phthalate-free.