【Adopting SUS316 Stainless Steel】: The inner container is made of SUS316 food-grade stainless steel. Compared to 304 stainless steel, it has better corrosion resistance, durability, and antioxidation. It is highly resistant to corrosion and rust. It can withstand the heat of various foods and does not release harmful substances that can harm the body. The reinforced SUS316 ensures the freshness of food and drinks, making it safer to use. 【Confidently Insulated for Heat and Cold】: With a vacuum insulated design, it provides up to 6 hours of heat and cold retention. Whether you're out for a picnic, at work, or at school, it can keep your drinks at their purest taste for 6 hours. You can enjoy warm drinks in the winter and cold coffee in the summer. 【Leak-Proof Sealing】: The tumbler lid can be opened and closed, preventing dust and leakage. The inside of the lid has a silicone ring and composition that achieves maximum sealing and leak prevention. Even when driving or leaning the tumbler in a backpack, there's no need to worry about liquid spills as long as the lid is secure. 【Easy-to-Hold Tumbler】: The overall texture of the cup inclines towards a matte finish, while the striped body provides a good grip. It also prevents slipping and dropping. It's easy to hold and can be used anywhere. 【Rejecting Ordinary Designs】: With a convenient size of approximately 7*8.2*18cm (bottom diameter*mouth diameter*height), it is neither too big nor too small. It has a avant-garde and innovative design available in cool black, stylish beige, avocado green, deep navy, and vibrant orange. The cup becomes an accent to the overall coordination and adds vitality. Brand: ALNAE Product Type: Water Bottle / Mug Bottle Product Name: ALNAE Tumbler with Lid Insulated Stainless Steel Coffee Mug Tumbler Vacuum Insulated Leak-Proof Double Wall 450ml Cup Water Bottle Direct Drinking Insulated Mug Mug Bottle Presented for Business Use Unisex Portable 5 Colors (Black) Manufacturer: K128 Product Number: FLIP-CUP Color: Black Product Type: Mug Cup