Double Wall Glass Coffee Cup with Silicone Lid 12 OZ, Wall Glass Coffee Mug

"SAFE VENT HOLE - The double wall glass has a pinhead-sized hole somewhere in the glass. These holes will not let water/steam/condensation water enter, which can well reduce the glass bursting during use. Water and air can only be expelled, not entered. They will be completely hermetically sealed. Therefore, our double wall glass coffee mug has high safety and long service life. SEAL LID - The insulated coffee mug is equipped with a silicone inner plug made of maternal and child grade material, which is effective in heat preservation and leak-proof, and the water will not leak out easily. Since the sealing inner plug is detachable, it is very easy to be cleaned. But pay attention, there is an air hole on the top of the lid, please do not turn the cup completely upside down. HIGH BOROSILICATE GLASS MATERIAL - The coffee cup is made of heat-resistant lead-free borosilicate glass, which is healthy and environmentally friendly, and does not contain any harmful substances. It is an ideal drinking utensil at present. Borosilicate glass allows glass coffee mugs to withstand sudden temperature changes from -40°F to 300°F. In addition, the clear coffee mugs are super easy to clean, with a simple hand wash to keep them clean, or you can use the dishwasher, too. ARTISTIC DOUBLE DESIGN - PARACITY double wall glass coffee mug adopts the design of double glass. Air is sandwiched between the double-layer glass, which effectively insulates part of the temperature and prevents hands from bein