Back in the late 80's or very early 90's, I was in an antique shop in San Francisco with my then-wife, and almost purchased a set of "Bottoms-up Glasses" that were from the early 1920's. A "Bottoms Up" glass is basically a shot glass with no base. You have to down it, and then set the glass down upside down on the table, because the bottom of the glass is a naked woman's rounded bottom, and the glass will fall over if you set it down on it's "bottom". The set was probably $150, at the time, and after much debate, my wife and I decided not to purchase them. And I have regretted that decision to this very day. (She and I still talk about the Bottoms Up Glasses that got away!) Every couple of years I search for a set that meets the idealized mental image I have of that set... and I always come up short. I will find a set one day that meets my exacting criteria. But until then, it is my Holy Grail.