Props glass for Cabaret

How can the drinking glass for the "raw egg" cocktail in Cabaret be built?

What is your question? Does your actor not want to drink the raw egg? I ran this in a regional theater and the actress drank a real egg every time, not issue. (100+ times)

Instead of worcestershire sauce (Called for in the script IIRC), use vanilla, makes the egg taste like cookies.

I don't recall the specifics of how it goes down but 2 things came to mind, use a glass you can't see through and just don't put anything in it (or put anything in it) or if you want to have the visual of breaking an egg and putting it in, have a bar cart with more than one glass on it, break the egg, mask briefly with the actors body, drop it in a different glass, and drink from the glass in front of it. (assuming the issue is that person doesn't want to drink the egg).