Verre A Biere Gravity 400 Ml X2Set of 2 Balvi Gravity 400 ml double walled beer glasses that keep the inverted bottle shape cold. Cold drinks for longer. The double wall keeps drinks cold for longer. Ideal for beer, water, and other carbonated drinks. Contents. 2 x 400 ml glass glasses, dishwasher and refrigerator safe. THE IDEAL GIFT. Ideal for beer lovers. Inverted bottle shape and floating effect. HIGH QUALITY. Made of quality glass COLD DRINKS FOR LONGER. The double wall keeps