The insulated champagne flutes tumbler adopts double wall insulation technology, which can keep beverage at a proper temperature(keep hot for 3 hours and keep cold for 9 hours). Furthermore, the stainless champagne tumbler with insulation technology can effectively prevent you from touching too cold or too hot tumbler surface to improve your hand comfort.Slim tumbler body make you hands easy to hold, which improve your hand sense. In addition, elegantly designed champagne tumbler will show your unique elegance in special occasions.Please call us for more info!