... CIQ & SGS Heat-resistant opal glass coffee cup set 12pcs Detail Description--1.Description:coffee cup 12pcs2.Material:glass3. ... the nice quality and competitive price.Jiancheng High-Tech Glass Five Advantages1.High corrosion resistance1)Microcrystal surface is almost no ... heat resistance temperatue is 120degree.2)Melted by 1500degree high-temperatue,the pyrex glass is bright,stable,nontoxic,flavourless ...