This product belongs to the HS Blue series. Please refer to the diagram below for details. The Toyo-Sasaki HS Stackable Tumbler set is a testament to Japanese craftsmanship and enduring design. Crafted from HS Toughened Glass, these tumblers are part of Toyo-Sasaki’s premier Hard Strong (HS) series, a brand beloved in Japan for over 40 years and honored with the prestigious Good Design Award. Featuring a divine bronze hue, these tumblers combine elegance with practicality. Their stackable design makes storage effortless, while their sturdy construction ensures durability for everyday use. Perfect for water, juice, cocktails, or any beverage, these tumblers are a versatile addition to your home, office, or café. Made in Japan【Test】 Our “Stackable” glassware should pass our 3,000 times stack in total. "Hard Strong" glassware got a little bit scratches by the 3,000 times, however, non-toughened items is broken at 100 items. 3,000 times= 1500 times stack x 2 glass 【Why 3,000 times？】 How many times do you stack your glass per day? If you stack it 2 times per day, how long the glassware would last? -1500 days means about 4 years. Left items: HS item, which is applied toughening process to glass edge portion. Right items: Non-toughened items.
