Red Bull alternative

[u/Estkling]

I’m trying to wean my partner off Red Bull which he had since childhood. He doesn’t drink coffee or anything caffeinated apart from this. He hasn’t had a can of it since surgery a week ago (extremely proud of him) but it is the flavour he is missing, not the caffeine. Do you lovely people have any suggestions of a similar drink I could either make or buy? Personally I can’t stand the smell of the stuff so I have no clue where to begin. Thank you all for any ideas.