The material is Borosilicate Tempered glass. It's heat resistant glass, the advantage for our glassware is as follows: 1.Non-porous glassware. It won't absorb food odors, flavor or stains. 2.Higher resistance to mechanical shock: scratch resistant. 3.Higher resistance to corrosion. 4.Higher hygienic performance. 5.Can be used in oven, microwave, Dishwasher, freezer, refrigerator etc.