Although there's no substitute for a good sleep, sometimes if you're going to be driving all night long, these drinks can give you quite a kick. Every Thursday morning, I have to go in at 3 in the morning to sweep downtown. It's bad enough having to be in at that time of the morning, but when you're traveling at 3- mph (I'm a street sweeper operator), sometimes I literally have to fight sleep to keep from nodding off. But when I drink one of those little orange bottles, after about 10 to 15 minutes I'm wide awake and ready to roll.
This is not a sales pitch, I'm just letting everyone know that these drinks work good for me and would recommend giving them a try if your ever sleepy. (I would NOT recommend taking one all the time because it's probably not that healthy and you can also get dependant on them).