... ,eco-friendly *any design and shape available tempered glass coaster*dishwasher,microwave safe*high safety and strength ,eco-friendly ... produce according to your requirementHuaxu 3mm tempered glass (also called toughened glass) is made though special physics toughened ... safety and strength,are also called toughened glass,unlike annealed glass, tempered glass breaks into small,square pieces .when broken ...