Insulated Stainless Steel Water Bottle:We use food-grade 18/10 stainless steel for the inner tank, food-grade 18/8 stainless steel for the outer tank, never worry about tasting plastic or metal in the water. Double layer vacuum insulation technology allows it to keep hot liquids up to 12 hours and cold drinks up to 24 hours. Sweat proof, no condensation. Healthy and Practical:BPA-free healthy water bottle for a better drinking experience. The bottom of the water bottle is designed with silicone material, which can make the water bottle more stable. Environmentally friendly bamboo cover, simple and stylish, with built-in sealing ring to effectively lock water and 100% leak-proof, making it safer to carry. You can easily screw on to keep your handbags, backpacks and school bags absolutely dry. Elegant and Stylish Appearance:The appearance of the thermos bottle is ergonomic. The elegant lines fit the hands better, and the streamlined cup body design, with glossy spray paint, is