... *18cm 2,Material is borosilciate glass 3,eco-friendly,heat resistant, 4,High quality,good price Borosilciate Glass,Coffee Cup, Tea Cup Product ... description: 1,Material is borosilciate glass which is eco-friendly,heat resistant and no plumbum2, 11mm ... white crystal bottom 3,It can be heated by alcohol lamp directly4,Its size ...