HIGH QUALITY Made with a food-grade 304 stainless steel inner wall, BPA-free PP plastic lid, and a silicone ring at the bottom of the lid for a leak-proof seal. The exterior is made of stainless steel and eco-friendly paint, beautiful and rust-resistant. KEEPS DRINKS HOT & COLD FOR HOURS Keeps drinks hot for approximately 12 hours; at a room temperature of approximately 24°C, filled with 100°C hot water, after 6 hours approximately 75°C. After 12 hours approximately 46°C. Pre-warming with boiling water before each use is recommended. LID IS A SERVING CUP The lid doubles as a 150ML serving cup; when drinking hot beverages, using this cup quickly lowers the temperature. ONE-BUTTON FLIP LID Airtight lid with a push button to control the opening and closing of the bottle; 360-degree pouring makes it easier to use. The lid components can also be separated for easy daily cleaning. Each bottle includes a sponge brush as a gift. MEDIUM CAPACITY Available in 410ML / 540ML capacities, lightweight and easy to carry. Our stainless steel water bottle is suitable for daily use, such as school or work, travel, camping, beach, hiking, and cycling, etc. Carry it as your daily companion to stay healthy and hydrated.