Made in Japan from "Fine Clear" Soda Lime Glass. “Fine Clear” is the name of high-grade soda-lime glass material developed by Toyo-Sasaki Glass. In addition to its strength, Fine Clear achieves supreme clarity and brightness comparable to crystal glass which makes it an ideal material for glass tableware.
By heating and rapidly cooling the glass surface Toyo Sasaki created the Hard Strong ("HS") line with a strong tempered layer which is difficult to scratch and highly durable.
The HS series made its debut as Japan's first commercialized glass-rim toughened glassware brand in 1967. The safety, quality, and value it provides have made HS the top brand in the hospitality and food service industries in Japan.