Might get flamed for this but...

[OhHannah]

Well, after trying it in apple juice, the impression I got was that any citrus or sharp tasting fruity base for the drink actually worked pretty well. I'd hit it.

[R.P. McMurphy]

Tuna shakes:

half cup to a cup of oatmeal, depending on your carb needs
1-2 5 oz cans of tuna, depending on your protein needs
water to fill
your favorite single serving drink flavor crap (crystal light or whatever)

I'm sure you're making a face by now but I promise you it's as bad as it sounds. Just make sure you add enough water so it's not too chunky and serve it cold. I like to put about half a scoop of strawberry flavored whey and the lemonade crystal light- I swear it tastes like a lemon starburst with only a slight fishy after taste. It's a great way to suck down a meal in a hurry and it beats the hell out of eating your tuna straight from the can. I promise you'll be a fan.