If you're looking for a unique way to describe a drink served in an "old-fashioned glass," there are several synonyms that you can use. Some people refer to this glassware as a "rocks glass," which is a short tumbler that's often used for serving whiskey and other spirits. Others may call it a "lowball" or "low tumbler." These options all refer to the same type of glassware, but they can add a bit of variety to your writing. Additionally, you could use descriptive phrases like "short and sturdy tumbler" or "classic barware" to paint a picture of what you're talking about.