Cynder's food is just kept in the bag under the kitchen sink. I'd like to get a container for it, though, because keeping it in the bag bugs me as it can't close.
Chloe and Rose's food are in what I'll call trash cans, I suppose. They have a flip lid that latches on the top. You hit the button on the lid and it pops open.
I keep the ferret food in an old dog bone container. It's plastic and has a tight fitting lid, so it works really well. It also has a handle, which is nice. It can hold around 20 pounds of food, I think.