Well, good place to chech right now is CVS. They had a huge sale on rubbermaid tubs in sets. I think 5 6qt ones were 5.99 and they had some larger sizes and under the bed somes too that would work fine.
Oh man, Neonates are soooo little. I have to feed my babies pinky heads or torsos because they can't take a whole pinky :-D it's cute watching them try, though.