Heart Shaped Double Walled Insulated Glass Coffee Mugs or Tea Cups Double Wall Glass 8 oz Clear Unique and Insulated with Handle

 Glassware is made of Borosilicate glass that is light and strong. It may feel thin, but it's much stronger and more durable than common glass. High Quality, Safe and Non-toxic Good thermal stability, slow heat transfer. The performance with quick thermal quench undergo certain difference is not easy to crac Chemically stable, durable. With some carbonate acid and alkali, salt erosion and air capacity of gas, no rust agin With the characteristics of resistance to cold, can withstand instant temperature difference -20??180?. Product Name?Heart cup Craft: handmade glass Material: high boron silicon glass Capacity: 240ml Size: 3.77in * 3.74in * 2.04in Heat resistance: -20??180? At the bottom of the hole is the exhaust hole left the production time, please don't misunderstand is a product defect oh