Toyo-Sasaki Glass Circle Tumbler B-02181 can be used for all genres of beverages. TSG is the leading glassware manufacturer in Japan founded in 2002 following the merger of two companies dating back to 1878. TSG makes both machine-made and hand-made products. In Japan, TSG is the number one in terms of production volume and quality. With long-standing traditions and sophisticated technologies, the company continuously develops practical and universal designs perfectly fit for every dining and drinking scene. TSG is the foremost producer of super light and thin yet durable products in Chiba prefecture near Tokyo.