So I can't buy a few to go to give to my friends/family? That's kinda stupid.
How about these customers just not consume stuff that's dangerous for them? Maybe put a warning that since it has a lot of caffeine, people should consult a doctor if they have known health conditions about what amount of caffeine they can handle.
Why? If they're properly informed (e.g. there's a label saying how much caffeine it has, and a comparison to other common beverages), people should be able to choose for themselves.
Yeah they'd have to basically make it against the rules to ever have two lemonades, even if one is for someone else. People are determined to kill themselves lol