Neoflam lovely double wall mugs and glasses are every bit as gorgeous as they look The double wall feature is great for making it easy to hold without having to worry about burning your hands when steaming hot liquid is poured in You don't have to wait for it to cool off like other cups or mugs in order to hold it It helps keep drinks warm for a surprising amount of time Unique double walled glasses are designed to suspends drinks within an inner wall for an engaging optical effect Beautiful addition to any cafe, restaurant and definitely to your own home Hand blown glass insulation ensures your favorite drink stays at the ideal sipping temperature The double wall glass design will make your drink appear to be floating in mid-air Made from durable Borosilicate double wall glass that prevents condensation inside with sealed bottom