About this item. 1, Material: Food grade stainless steel on double wall. And toxin-free for a pure taste without transferable arms. Reusable and refillable cold hot water bottle without chemical factors. You can rely on daily use. 2, Dual Function: This mug can keep warm and cool. You can still drink cold or hot drinks. Whatever the time of year, it is a good essential partner in your life. 3, Design: The design of the bottle neck is smooth and round, giving you a better experience of consumption. The diameter of the bottle is 6.5cm and the correct size allows you to easily hold the water bottle. 4, Usage scenario: we provide six colors, different crafts and different colors . You can choose the one you like the most. You can bring the trophy to sports, travel, school, the gym, hiking and work. 5, accessories: Weve also prepared a black mug cover and mug cleaning brush to protect your mug from scratches and make cleaning easier. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it