✅Premium Stainless Steel： This insulated mug is made from 304 stainless steel (18/8) and features exclusive double-wall vacuum technology, keeping drinks cold for up to 24 hours and hot for up to 12 hours. It's BPA-free, tasteless, durable, and resistant to oxidation. The cap features a food-grade silicone seal to prevent leaks. It's hand-washable and dishwasher-safe. Portable and Versatile Design： The non-slip coating and smooth body provide a comfortable grip and prevent slipping. This stainless steel water bottle is easy to carry and store in your bag. Its ideal size fits easily into gym bags, cars, bikes, and backpacks. It's perfect for school, the gym, the office, outings, or vacations. Perfect Gift： Available in 18 colors. Perfect for coffee, tea, or cold drinks, it's perfect for your diverse diet. It's an ideal gift for fitness enthusiasts or friends who frequently travel. Attention: -Due to manual measurement, there may be an error of 1-3 cm. ​-Please understand that the color may deviate due to different monitor settings. ​-If you are satisfied with our product or service, please give us 5 stars feedback, we are very much looking forward to your review!