they are handmade by expert artisans. Because this cup is mouth-blown, each one may have slight differences in height, thickness & weight.And the saucer is made by man-pressing , so they can satnd more than 600 degree above zero.Dishwasher & microwav... - Update: 2009-08-07

This cup and saucer are Made of heat-resistant borosilicate glass , they can satnd more than 600 degree above zero . - Update: 2009-08-07

heat resistant glass www.wonderfulhomedeco.com - Update: 2009-01-21

tea and coffee set heat resistant glass ware - Update: 2009-09-24

our glassware is made from durable Borosilicate glass. Borosilicate glass is a strong heat-resistant glass that weighs less than traditional glassware. Used to make scientific lab glass, borosilicate glass (medical grade glass) is stronger than tradi... - Update: 2009-08-07

glassware is made from durable Borosilicate glass. Borosilicate glass is a strong heat-resistant glass that weighs less than traditional glassware. Used to make scientific lab glass, borosilicate glass (medical grade glass) is stronger than tradition... - Update: 2009-08-07