This is an item of stationery (paper or writing goods), or other small merchandise such as good-luck charms, mascot straps, et cetera.
Gokudera and Yamato know how to have a great time at a summer festival! They're printed in vibrant shades of red and blue on this high-quality drinking glass, about 8cm tall and 5cm across--just the right side for a quick refreshing drink any time of day or night. Sold in a handy box to make it an ideal gift for just about anyone!