This weird little item would be ideal for Don Draper and his friends at Sterling-Cooper. It’s a Martini Tester. Just pull the dropper out of its case, dip it into your Martini and fill it. If two balls float but one sinks, it’s a regular Martini. If one ball floats and two sink, it’s a dry Martini. If all three balls sink, it’s an extra-dry Martini.
The tester features around its mid-section, a metal fountain-pen clip which holds the tester firmly to one’s pocket. On the clip is a round white pinback-style button that reads, “Gourmet Martini Tester.”