Double Wall Vacuum Insulated Water Bottle Capacity -1000 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 Flavour 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. BPA-Free & Toxin Free -Easy to Clean -Use Mild Soap for cleaning the Flask and advised to be kept open when not in use to avoid odor