Double Glass Double Wall Glass Mug 300 ml Home Office Cup Double Layer Heat Insulated Glass Cup With Handle

Piece of Thermal Insulated Borosilicate Glass Cup. The product features double layer glass and thermosil. Heat-resistant, Stylish, Elegant and Double-Walled Design. It is made of high quality borosilicate glass. Don't let your coffee get cold at home, at work or in the office. 250 ml Borosilicate Glass has a granite-like structure, is very difficult to wear, does not scratch It is resistant to high temperatures as well as low temperatures. There is a round mark on the bottom of the glass due to the construction of the double-walled glass. It's not a defect!!?