I like the RB + Jag, but am looking for some alternatives that might be out there... I think they should offer up some others for people who like to try different things. RB is great don't get me wrong, but can't hurt to try something new either!
Just about any thing could be mixed with alcohol especially with vodka, but red bull created a mixer. A type of flavor profile people expect. If someone orders a rum and coke you could serve them almost any cola with rum and most people will find it acceptable. Give someone who orders a rum and coke a rum and orange soda and I think it could be a problem. How bout gin and tonic? Gin and black cherry soda just will not due. Seven and seven? Try giving them seven and birch beer. That will go over really well. Scotch and soda? Well I guess any soda will due. Try cream soda; see how the old guy at the bar likes that. Bourbon and water? Give em ice tea they wont mind.
At this point its a mixer you cant replace red bull with sugar free passion fruit flavored energy stuff and expect people to think they are getting what they ordered.
You can mix anything, but will people walk in off the street and ask for it like they do red bull?
You cant replace tonic, cola, lemon/lime soda (i.e. 7 up or sprite), and club soda or cranberry juice. And you cant replace energy drink. You can give them something other then red bull but it better taste like red bull.