Have a soda with a long straw and some one to throw chesse puffs at you
That's a pretty awesome idea, but I'm pretty sure around 90% of the cheese puffs thrown at you would not go in your mouth.
I don't know, I don't really eat much while gaming, mostly I just eat before or after. But I'd say it would be a granola bar, because it's quick to eat.
Some Sprite (or another drink of your choice) either in a can, or in a bottle with a straw. To go with it, a batch of brownies, they don't really dirty up your hands, and chewy!