This is the $20 Zelda Hydration Cartridge available from ThinkGeek. It's a flask in the form factor of the original gold Legend Of Zelda NES cartridge (same idea as these but with official licensing). Plus it comes with a straw. Not a krazy straw though, just a straight red one. I would have preferred a krazy straw. Not that it would affect my purchase decision, because I already have a flask. "That's a tequila bottle." I cut out the middle man.
Keep going for two more shots.
Thanks to Ty, who wants a flask that looks like a CapriSun pouch or Juicy Juice Box.