Material: Stainless steel Size: 88*115mm Color: White, Green, Purple Charging method: Battery 1. Outstanding thermal insulation effect: Made of stainless steel material, it can effectively keep the water temperature, allowing you to enjoy hot or cold water anytime, anywhere. 2. Healthy and environmentally friendly: Made of stainless steel material, you can use it with confidence while reducing the environmental pollution caused by disposable plastic bottles. 3. Exquisite appearance: Simple and stylish design, exquisite appearance, suitable for carrying in various occasions, showing your taste. 4. Large capacity: Large capacity design can meet daily drinking water needs without the need to frequently add water, convenient and practical. 5. Leak-proof and non-slip: With a sealed design, it is not easy to leak, comfortable and non-slip to hold, safe and reliable. Package includes: 1* thermos cup