Double layer coffee cups is a high-quality espresso cup, fashionable and elegant style retro, glass texture is good, suitable for dishwasher, microwave oven use, can be directly poured into boiling water. Note: There will be a small closed hole at the bottom of the coffee mug and it is not a product defect, it is left by the special process of making the coffee mug, please do not destroy the small hole, so as not to affect the use.