punpun tea cups double wall borosilicate glass espresso cups heatproof insulating teacups glass 2.7oz. 80ml set of 4 demitasse gift box punpun superior double wall borosilicate glasses ,with high temperature resistance from -20~150 degree centigrade.</p> <p></p> <p><b>warm reminder:</b></p> <p>1. it is recommended to use toothpaste when cleaning stains such as tea or coffee stains .it’s much cleaner and won’t scratch the cup . 2 it is recommended to use a wooden stirring rod to avoid scratches.</p>