Chocolate Cordial Cups

In my cache of vintage magazines, there are certain advertisements that appear often. In my 1930s magazines, there are the ads for Heinz tomato juice that feature the Aristocrat Tomato Man (Google it to see what I'm talking about), while the 1950s-era magazines promoted Fostoria glass. And my 1960s issues harbor numerous ads for Chocolate Cordial Cups made by the Astor Chocolate Corp. of Brooklyn.

I think that I've seen these chocolate liqueur cups before, but I never thought much about them until I kept seeing the Astor Chocolate ads time and time again. A search on the internet led me to the Astor Chocolate website, where they are still selling these chocolate cups bound in gold foil cups. According to their website, the company's owner devised these edible shot glasses in response to 1960s-era laws that prohibited the sale of liqueur filled chocolates. In one's own home, though, one could play mixologist/chocolatier without any fear of breaking any laws. Hence, the chocolate cordial cup.

I'm curious- have any of you served these cups when entertaining? If so, what kind of liqueur do you pour into them? I'm intrigued by the idea of them and am thinking of ordering some. I might serve them with a shot of Framboise seeing that chocolate and raspberries go hand in hand. Amaretto or Frangelico might be nice, too, although I'm thinking that Midori might look a little radioactive in those chocolate cups. What do you think?