18/8 Stainless Steel Our water bottle is made of high-quality stainless steel material, which is sturdy and durable. A Double-wall stainless steel flask provides pure taste with no flavor transfer. All water bottles are BPA-free. Vacuum Insulated With vacuum insulated technology, vacuum insulated stainless steel water bottles can keep beverages cold and hot for hours. Different environments, beverages, initial temperature, and other factors will affect the current insulation effect. Product Features Our vacuum insulated water bottle has a wide-mouth design. You can easily fill the water bottle with ice and clean it. Covered with a frosted matte powder coating (anti-slip and sweat-proof) Reusable Whether you're sweating outdoors or working indoors, you'll need a reusable water bottle that can keep your drinks cold or hot no matter what. Our water bottles come in different capacities and are easy to carry anywhere, making them perfect for daily use. This is an ideal gift for your loved ones to help them stay hydrated and healthy. Product care instructions Hand wash. Please clean the product thoroughly before using it. Do not put the kettle in the oven, microwave, refrigerator, or dishwasher to avoid damage. Do not over-tighten the lid or force it open.