Double Wall Vacuum Insulation - Advanced double wall vacuum technology keeps beverages hot or cold for long hours, ideal for office, school and travel use. Premium 18/8 Stainless Steel (SUS 304)- Made with food-grade SUS 304 stainless steel, ensuring durability, rust resistance, and safe drinking No Sweat Exterior Design- Condensation-free outer body prevents sweating, keeping school bags and hands completely dry. BPA-Free & Health-Safe — Made with toxin-free materials for safe drinking water; perfect for kids, adults & athletes. Ergonomic & Stylish Design — Sleek look with comfortable grip, perfect for office, gym, outdoors, trekking & gifting.