Decoration One Glass Milk Cup Pearl-Coral-PlatinumGlass milk cups, considering its name, is made by glass, and to be more specific, by high borosilicate glass. The glass has been fired under the temperature as high as 600 degrees Celsius. This is an eco friendly teacup increasingly loved by people. Coral and Pearl designs adorn the cups, along with the Arabic Calligraphy. The collection is available in gold, platinum and white.