What grade of glass does hals belong to?

Hals, one of the top ten famous brands of water cups in China, is a high-end water cup brand in China. The cups under this brand are famous for their good quality and durability, and belong to the domestic conscience brand. Their stainless steel cups are light in texture and smooth on the back, which is very delicate. Zhejiang hals Vacuum Ware Co., Ltd. is a joint-stock company that mainly develops, designs, produces and sells cups and pots made of stainless steel, titanium, glass, plastic and aluminum. Zhejiang hals Vacuum Ware Co., Ltd. was founded in 1985 and formally established in 1996. Headquartered in Yongkang, Zhejiang Province, it is a brand operator and manufacturer of the cup and pot industry, and the president of the cup and pot branch of China Daily Miscellaneous Products Industry Association. Established important production bases in Lin 'an, Hangzhou and Bengbu, Anhui, and acquired SIGG, a century-old Swiss enterprise, on 20 16. The company mainly develops, designs, produces and sells cups and pots made of stainless steel, titanium, glass, plastic and aluminum, and advocates intelligent, lightweight and healthy drinking methods.