Come and see our amazing products. Double-walled glass cups is made of mouth-blown, lab-quality borosilicate-glass construction for a durable and heat resistant glass. Our special double-wall insulated design prevents side heat transfer, maintaining the ideal temperature and never burn your fingers.also burn marks or wet rings will be left on your especially precious leather or wood table. Ergonomic shape fits your hand perfectly without a handle. BPA free Safe for dishwasher and microwave use; not for use with any metal utensils. Borosilicate glass is easy to clean and built to last - the material you want when dealing with any glassware for the best results. Pls confirm with us about the packing info, stock color and exact production time before placing your order