The Bodum 10325 10 canteen double wall cup will bring a modern and innovative change to your everyday drink ware. The mug features walls with two hand blown layers that creates an optical illusion of the suspended liquid inside. The mug is crafted of borosilicate glass that is used to make scientific lab equipment making them exceptionally strong lightweight and thermally insulating. The two layer construction allows the piece to retain heat and prevents condensation making the glasses remain comfortable to hold and safe for any table top.6 ozBox contains 2 mugsDishwasher safeCrafted of lightweight thermal lab quality borosilicate glassTwo mouth blown layers make liquid inside seem to floatWinner of the prestigious European IF Design Award