Set of two pieces of double-insulated glass.
 Innovative double-wall construction keeps hot drinks hot and cold drinks cold.
 It is also perfect for serving soup or cold desserts.
 Made of heat-resistant, mouth-blown borosilicate glass.
 Hydrophobic silicone vent equalizes air pressure between the two layers of glass.
 Dishwasher, microwave and oven safe (up to 350ºF/176ºC).