I make a lot of cocktails, and when I saw this I thought, "I can make that." This works on beverage density, so put sugar heavy liqueurs on the bottom, juices next, and alcohol floating at the top.
There are 2 size funnels here to suit your needs, short and tall. I've printed and tested this. It works as advertised, just be careful not to snap off the bottom prong. If someone can tell me how to filet them together in solidworks, I'll re-upload.
Because this needs to be water-tight, I recommend printing this with at least 3 skins. No supports required.