Premium 304 stainless steel construction ensures durability and toxin-free liquid storage. Advanced vacuum insulation technology maintains beverages hot for 12+ hours or cold for 24+ hours. Leak-proof swing lid design with silicone gasket prevents spills during travel. Ergonomic curved body provides comfortable grip for daily use. Mirror-polished interior resists flavor retention for versatile drink options. Available in two practical sizes (380ml/510ml) for different hydration needs. Ideal for office commutes, road trips, gym sessions, and outdoor adventures. Seamless laser welding prevents joint corrosion for long-term use. One-touch button opening enables easy单手operation. Matte exterior finish resists fingerprints and scratches.