Libbey 15587 Restaurant Basics 12 Oz Double Old Fashioned - 24/CS

This Libbey 12 Ounce double old fashioned glass 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