The Groovy Cup features an outer wall of clear glass that frames a funky, bumpy, colorful surface underneath. Guaranteed to add some fun to your drinking experience no matter what the beverage. Made with Borosilicate glass which is resistant to thermal shock, more so than any other common glass. Each cup sold individually. Borosilicate Glass Dishwasher safe 6.8 oz (200 ml) 2.75" diameter x 3.5" height (7 x 8.9 cm)