What are your favourite craft storage containers?

My biggest thing that I did last weekend was (finally) organize my knitting. I put to recycling all those plastic bags and cardboard boxes that I've been using for the last year.

At Home Depot, I found these fantastic collapsable milk-crate-like containers, and the 32L ones were around $5 and the 48L ones were around $9, so I bought a bunch of the smaller ones, which ended up being perfect.