Specifications: Double wall design for insulation, so it is safe to use. The texture is smooth and transparent, easy to clean. Made of high borosilicate glass, clear and exquisite. Cold and heat resistant function, rating of temperature: minus 20 degree Centigrade to 130 degree Centigrade. Item Name: Glass Cup Material: High Borosilicate Glass Capacity: 150ml/250ml/350ml/450ml Features: Insulation Cup, Easy to Clean, Non-toxic Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 6 x Glass Cup + 6 x bamboo lids