*UPDATED, more vibrant opaque artwork!! A rocks glass is a short tumbler used for serving a drink like whiskey (on the rocks) or cocktails like the Old Fashioned. These heavy duty rocks glasses showcase the best of Derek&';s Abstract Fish Flank Series in a beautiful fully wrapped print within the glass. Great compliment to the Pilsner Glasses. Microwave safe, but not dishwasher recommended. Made in the USA.