• Made of borosilicate glass and is guaranteed to withstand temperatures of up to 300-degree centigrade • Can be safely used in the microwave, oven, fridge, freezer, and dishwasher. • Stackable: No •, Unlike plastic and melamine, will not leech chemicals into your food even over repeated usage • Non-porous glass will not absorb stains or odors • Color: Transparent, Material: Glass • Warranty Information: 2 years warranty against manufacturing defects