Meet Daburu; our double-layered glass mug set that turns any beverage or dessert into a work of art. Our glasses are individually mouth-blown to create a floating effect on your drink of choice. Main Features & Benefits Set of 4 mugs; 310mL / 11.8oz max capacity Made from heat-resistant borosilicate glass that is BPA, lead and cadmium free. Features two walls of borosilicate glass, creating a highly effective layer of insulation Keeps your hot beverages hotter and cold beverages colder for longer The ergonomic glass handle provides a secure and comfortable hold These tumblers turns daily necessities into a treat from your favourite espresso drinks to teas, smoothies or even classy evening cocktails. Dishwasher, microwave and oven safe (Up to 350ºF/176ºC) Warning: To avoid fracturing the inner wall, please take care when using metal spoons or ice cubes.