Doomin's glass measure cup set are made from high quality borosilicate glass, which can be used for storage, cooking and microwaving. (1)Multi-Purpose: Easy to read measure indicator and comfort grip handle, great to use as bakeware and prepware. (2)Perfect Size 1 Cup (250ml/8oz) 2 Cup (500ml/16oz) 4 Cup (1000ml/32oz) (3) Safety Choice Microwave, Dishwasher, Preheated Oven, and Freezer safe; lids are BPA free, and top rack dishwasher, and microwave safe. Working temperature: Withstand from -5℉ – 700℉ (-20℃ – 400℃).