1 HIGH QUALITY MATERIALS: Our insulated water bottle is made of rust-resistant food-stainless steel (18/8). Its durability is of its greatest advantages. The -coated treatment makes the water bottle almost indestructible, and it is easy to hold even when sweating in the summer, resulting in a longer life. EXCELLENT INSULATION: This stainless steel insulated water bottle is made of copper-coated material. Double wall vacuum design can effectively prevent the ice in the bottle from melting quickly, and it can cold drinks for 24 hours, meeting the needs for drinking water during hot summer days outdoors. BPA-: This insulated water bottle is of bisphenol A and complies with the requirements of the Food and Drug Administration. It contains no substances and meets the water requirements of different age groups. LEAK PROOF: This insulated water bottle is equipped with a 100% leak-proof sealing cap. Once the cap is tightly closed, it won't spill when thrown into a backpack. It is an ideal water container for travel or outdoor climbing. 100% PERFECT AFTER-SALES : We are committed to presenting the best products to our customers. If you have any dissatisfaction with the received product, please as soon as possible. We will provide the highest quality to solve all your problems