Main materials: borosilicate heat-resistant glass;Cover material: European standard food grade silica gel.The material meets FDA testing standards.You can buy with confidence. Usage scenarios: office, home, go out to carry;This glass bottle can be put into a backpack and carried out.The cover can seal against dust and prevent water leakage.(make sure the cover fits into the slot before placing it in the bag.) Honey, you can use it as purified water bottle, juice bottle, ice coffee bottle;The bottle can withstand an instant temperature difference of -20 degrees Celsius to 150 degrees Celsius, so the refrigerator is safe, the dishwasher is safe, the microwave oven is safe. \"Our designers use woven anti-ironing cup cover, which can also be filled with hot water. When filling with hot water, cover the lid after the water has cooled slightly to prevent the lid from bouncing off under high pressure steam.\" If you have any Suggestions about the product, please contact us by email.We are glad to receive your Suggestions for the subsequent improvement and upgrade of the product.Whether it\'s giving us good advice or bad advice.