Model #: 15249DuraTuff TreatedUse Traex rack TR-12 with this Gibraltar DuraTuff Rocks GlassThis Libbey small 6 Ounce rocks glass features an octagonal body and has been treated with Libbey's patented DuraTuff thermal after process for "pressed" tumblers, which gives the top portion of the glass maximum resistance to thermal and mechanical shock. When you see the embossed DuraTuff name on your product, it means you're getting the longest service life in the foodservice industry.Model #: 15249 DuraTuff Treated Use Traex rack TR-12 with this Gibraltar DuraTuff Rocks Glass 400234