Model : 15643 DuraTuff Treated Excellent clarity Resistant to thermal and mechanical shock Straight paneled design This 20 Ounce iced tea glass features a paneled 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 #: 15643 DuraTuff Treated Excellent clarity Resistant to thermal and mechanical shock Straight paneled design Use Traex rack TR-11GGA