Libbey 9 oz Endeavor Rocks Glass (case of 12)Case of 12 9oz Rocks Glasses Add style and flair to your serving presentation with the Libbey 9 oz Endeavor Rocks Glass. It's stackable for compact storage while the modern design presents drinks with elegance. The commercial glassware has a heavy sham for better stability and to increase perceived value. The old fashioned glass allows bars, restaurants and hotels to serve their signature cocktails. Plus, it's made with DuraTuff a treatment used to