We love love love these double walled Insulated glasses. Pretty much now will only drink coffee this way, it keeps your hot beverage warm probably 4 x longer than a regular cup or glass. They are on the pricies side but they are worth it. They dont do well in the dishwasher, will get foggy if you put in the wash regulary. They are better hand washed and are fragile, so I have had casualities when hand washing them but since we are hooked we just keep replacing them.