You don't NEED to feed in a feeding container as long as you regularly handle your snakes and you do proper husbandry (cleaning the cage, changing water, etc.) A snake will only associate you with food if the only time you open the cage is to feed it, that or you don't feed it enough (in that case it will strike because it's hungry and wants food.)
I always feed my snakes in their cages and I have NEVER been biten out of mistake. And it's not just because I have docile snakes. One is pretty mean for being a cornsnake.
I may be wrong, but when I read Blaino's post, I thought he/she meant what do you feed them in when they are being problem feeders. If so, use a small container where they can't get away from the pinky, like a deli cup (if you have one) or a small brown paper bag. Put small holes in the deli cup, but if using the paper bag, you don't need to worry about it. Enough air can diffuse through the bag.
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alstiver@hotmail.com
1.0 '01 Hypo snow cornsnake (Tesla)
0.1 '02 Ghost (pastel) cornsnake (Banshee)
1.1 '02 Bloodred cornsnakes (Desi and Luci Too)
0.0.3 Goldfish (Kabuki, Isamu, and Yuki)
1.0 American Eskimo mutt (Rusty)