I still have my 7up dispenser from childhood and bought one MIB off Ebay.
Back in the day I saw it in a catalog (along with all those other toy snow cone, taffy, candy and cake makers) and in my kid mind I thought it was a small version of an actual resturaunt style dispenser (my middle name is gullible).
Here's is what they look like:
I know they made one for Coca Cola (I would've loved to have a coke one as a kid, Coke is my favorite)
It comes with a couple small plastic glasses and a nossle made to go onto glass bottles of soda (which you place inside the dome).
It never worked that well and the nozzle was prone to leaking but it is still a beloved piece of my childhood.
Anyone ever get these type of dispensers?
Here's a Coke one: