Toyo-Sasaki Glass' long running brand HS (Hard-Strong) made its debut in 1967 as Japan’s first commercialized glass-rim toughened glassware. 00346HS was awarded the prestigious "Long Life Award" from Good Design Award in 1974. Its safety and quality have been loved broadly in hospitality and food-service industries worldwide. Dishwasher safe, perfect in space-saving on any tabletops at restaurants, café, bars and home use. HS Stackable Tumbler has TSG Hard Strong Blue proprietary glass toughening process, which makes this glassware durable. Set of (6) six tumblers. 1974 Good Design Gold Award recipient HS Blue glass-edge physical toughening Stackable; dishwasher safe Capacity: 250ml / 8.4 fl.oz. each tumbler; dim. - 67mm / 2-5/8" diameter; 95mm / 3-3/4" height each tumbler.