The double stainless steel walls of KINTO TRAVEL, with a vacuum in between, prevent heat transfer. The foil layer covering the inner wall reflects heat inward and perfectly retains both heat and cold. It keeps drinks cold for 6 hours at up to 8℃ and hot above 65℃. In addition to easy handling, the material and design support long-term use. The container is made of durable 18-8 stainless steel and is not easily prone to rust. The surface of the colored cups is powder-coated to avoid scratches. Furthermore, the smooth, electropolished interior is odor and stain-resistant, keeping it clean and fresh. With no screws present, the lid sits comfortably on your mouth and is designed to prevent ice cubes and hot drinks from splashing out too much, allowing you to drink comfortably until the last sip. The lid is leak-proof, so you don't have to worry about spills. The sealing closure is made of food-grade polypropylene and silicone. Dimensions (mm): 74 (diameter) x 197 (height with lid); 173 (height without lid).