Made from 100% borosilicate glass ; It is guaranteed to withstand temperatures of up to 350°C ; It is scratch resistant Heat resistant up to 400 degrees Celsius Air-tight and liquid-tight containers Easily stackable for convenient storage Microwave, oven, dishwasher and freezer proof Colour : Transparent, Material: Glass Package Contents : 3-Pieces Containers (320ml) and 1-Piece Lunch Bag Unlike plastic or ordinary glass, will not leach chemicals into your food even after repeated usage