FORLIFE Cafe Style Glass Mug with Coaster, 14-Ounce, Black Silicone foot cover will absorb the impact when the pot is placed on hard surface and prevent slip Coaster can be used as a cover to prevent spill and keep your drink hot or cold Hand crafted glass mug is made from true lead-free borosilicate glass; It stays clear and heat resistant It is compatible with microwave and dishwasher Ideal drink ware for hot and cold beverage