The Bergen is crafted by fusing two pieces of glass together through a process known as fused glass. In this technique, individual pieces of glass are melted and combined in a kiln, with the temperature gradually increasing to around 1000 degrees Fahrenheit. The resulting thick glass bases are a hallmark of the quality and craftsmanship of this drinkware, and their weight and solidity must be experienced to truly appreciate their value. DETAILS: 14.8 oz 2.8"Diameter x 6"H Fused glass Dishwasher safe Sold as a set of 4 glasses For up-to-date information regarding lead times please contact [email protected]