I used to work really really long hours when I was running my catering business. I would work in a restaurant all day then come home and do the prep for catering for most of the night. Some weeks I would literally go two days with zero sleep working around the clock. I became a connoissuer of energy drinks.
Five hour energy never worked for me, was expensive, and tasted like cough syrup.
Red Bull was ok but the taste makes me gag (though some people actually like it).
Monster is ok but too sweet for me.
Nos has a citrus taste that is not bad but it doesn't keep me awake very well.
RockStar tastes like liquid cotton candy and does nothing for me but make my wallet lighter.
Sobe Nofear is pretty much the same thing, maybe a little less sweet.
The number one energy drink in my opinion is called
Bawls. It's made with caffeine and guarana which is natural caffeine that comes from guarana berries. It gives me the best boost, has the best taste, doesn't make me jittery (though little does anymore), and isn't disgustingly sweet. I actually like the taste on this one so much that I drink it now instead of regular soda. I HIGHLY RECOMMEND THIS ONE! Ignore the weird name, it's the best. It's not in all areas yet as it is a fairly new product, it just started being available around Rochester in the last two years or so. You can usually find it now at Target and most 7-11s. You can buy it through their website too:
BAWLS
There is one other effective energy drink out there, you can buy it online but I recommend this one only if you REALLY need to stay awake. There is an energy drink called Cocaine, yes that's right, like the drug, that comes in little cans the size of Red Bull but packs a serious punch. This is coming from a guy who drinks seven shots of espresso every afternoon, if I say it is strong believe me it is. This stuff actually made me shakey and I fealt my heart racing. The first time I drank it I was like, "Whoa, so this is how everyone else feels when they drink what I usually drink!"
If you want to stay awke your best options are Bawls, espresso, Red Bull, munch some chocolate covered espresso beans, or in case of dire emergency a can of Cocaine. Leave that Rockstar junk alone though, yuck!