I've been at it again, looking over on think geek dot com, and have found an ingenious invention.
They are possibly the nerdiest things i have ever seen, but they're great! They are called mana/health potions and are designed for rejuvenating your 'mana/health' after a hard night of fighting dwarfs, or collecting the tears of azeroth.
The best part is the ingredients, they're all natural, meaning no flop after a few hours.
Or check out the original website, here.