The Avanti Nove Twin Wall glasses will keep hot drinks hot and cold drinks cold for longerThey are made from borosilicate glass for thermal efficiency and heat shock resistance. Stylish and practical, they will protect your hands from the heat of piping hot drinks while offering freedom from annoying, dripping condensation around your favourite cold drink during summertime.Features:Available in 2 sizes; 250ml & 375ml capacityMade from twin-wall borosilicate glassMaintains the temperature of both hot or cold drinksPrevents condensation on the outer surface with cold drinks and keeps fingers from burning with hot drinksDishwasher and microwave-safe