Double Wall Vacuum Insulated Water Bottle Capacity -720 ML, Inner and Outer side of Bottle is Made from 304 Grade Steel Which is Rust Free and 100% Food Grade. Vacuum Insulation Technology Locks in Temperature to Preserve Flavor and Freshness to Keep Beverages Cold for up to 12 Hours and Hot upto 6 Hours. Perfect Size Not too big, Not too small , Easy to carry , Condensation free and Leak Proof Lid.