From yahoo answers haha: Energy drinks are full of preservatives and under pressure, so much that they will never go bad.
As long as you drink them within like 2 months time i'm sure you're fine.
Don't quote me on that though...
Going skiing, then drinking instantly after until i black the fuck out. - Pussyfooter
What do you do before your firends come over. You dont plan convenient locations for linen. - Scientist