Starbucks owns Teavana and is planning on another 1,000 stores in the U.S. alone.  

Description

Made of Borosilicate glass, these double-walled tumblers have a strength and durability above that of traditional glassware. Light travels through the double-wall, illuminating the tea liquor within for an enhanced tea drinking experience. The double-wall also helps to prevent condensation from forming on the exterior. Perfect for hot or iced tea, the ridges provide an interesting design element as well as a comfortable grip. Holds 14oz (410mL) of tea. Teavana Exclusive. Dishwasher Safe. Each set includes 2 cups.