Oasis 30 oz Premium 18/8 Stainless Steel Travel Tumbler - Double Wall Vacuum Insulated - Keep Your Liquids Hot or Cold Stainless Steel Travel Tumbler #1 IN INSULATION AND TEMPERATURE RETENTION - Proven to keep your beverages hot or cold all day. DOUBLE WALL AND VACUUM INSULATED - Keeps your beverage AND your hands at the perfect temperature. SWEAT FREE AND FITS MOST CUP HOLDERS - No more wet cup holders. BPA FREE AND ECO FRIENDLY - No more garbage in your car or in our landfills. 100% SATISFACTION - GUARANTEED!