The Blueangle water bottle is made of premium 18/8 stainless steel that is 100% BPA FREE. This bottle will keep your drinks cold & hot for many hours! It will also never sweat no matter what the drink temperature.Feature? Wide mouth 2.2? opening--easy for cleaning and ice-filling? Keep cold up to 24 hours, and hot up to 10 hours? 100% non-toxic BPA-free? 18/8 food-grade stainless steel? Durable, easy-grip and sweat-free? Portable sizeInstructions1. Minors please use under the guidance of adults or after reporting.2. Clean the inside and outside of the cup with neutral detergent in warm water before use.3. In order to achieve the best heat and cold preservation effect of the cup, it is recommended to add hot water or ice water for preheating or precooling. It is better to add ice cubes when keeping cold.4. To prevent leakage, please tighten the lid clockwise when the cup body is tilted.Note1. Add boiling water to the cup, do not use straws when drinking to prevent burns.2. When adding boiling water to the cup, it should not be too full to prevent overflow and scald.3. Avoid falling, collision or strong impact to cause the cup body to deform and affect the product's efficacy.4. Please use neutral detergent and warm water when cleaning, do not use alkaline bleach, chemical wipes and other cleaning agents.If you encounter any problems, please contact us promptly, if you do not like them, you can unconditionally refund.