Come and see our amazing products. Our Double Threaded Coffee Mug combines old world craftsmanship with 21st century manufacturing techniques. The exterior is made of high quality glass material and they are as lustrous as crystal. The threads on the inside of the glass make the product more beautiful and also retain the strong taste and aroma of coffee, making it the perfect choice for your coffee. Also you can customize your exclusive logo on it. Pls confirm with us about the packing info, stock color and exact production time before placing your order.