Extra large capacity design 40 oz ( 1.18 litres): meets all-day drinking needs, suitable for outdoor sports, long-distance travel, office or student party. Scene-adapted: reduces frequent water catching, suitable for fitness, hiking, camping or long driving. Long-lasting insulation performance Double-layer vacuum stainless steel structure: inner and outer layers made of 304/316 stainless steel to isolate temperature conduction. Thermal insulation effect: Hot water: 50 for 12 hours Cold water: 24 hours 10 Applicable seasons: universal in all seasons, keep warm in winter, keep cold in summer. Humanised straw design Detachable straw: food-grade silicone material, high temperature resistance, easy to clean. Leak-proof lock: straw mouth with leak-proof design, inverted without leakage, suitable for carrying in the car or backpack. Drinking experience: one hand operation, free your hands, suitable for driving, office or sports. Durability and Portability Resistant to fall and pressure: stainless steel shell is impact resistant, suitable for outdoor environment. Portable Carrying Handle/Strap: optional carrying handle or strap, easy to carry. Anti-slip base: Anti-slip design on the bottom for stable placement.