HIGHEST GRADE STAINLESS STEEL: Made with Pure-Food Grade 18/8 Stainless Steel that keeps your drink\'s original flavour and NEVER retains or imparts smell or taste. STAYS HOT & COLD: Every Stein keeps your cold beverages cold for 24 hours, and keeps your hot beverages hot for 12 hours (PIPING Hot for 6 hours). Double Wall Vacuum Insulation For Maximum Temperature Retention. LEAK PROOF LID so you can rest easy knowing wherever you store your bottle, nothing will leak, ever. EVERY DETAIL PERFECTED: Wide mouth to drop in ice cubes. Rounded corners so nowhere for bacteria to hide. Comes in sustainable packaging. Easy to clean. ENVIROMENTAL IMPACT: every time you fill up your Stein, you are saving the environment from a plastic bottle. Product Code: STEINSLATEGREY