I use metal drums like this http://www.ebay.com/bhp/used-55-gallon-drums. We are able to get them for $12.00 from a place that makes snacks/cakes like Hostess cakes. They are food grade and have lids. Depending on how fast you go through feed, they will hold five bags of feed. The only problem with the one I got is that when you get to the bottom you have to tip the drum over to get to the bottom. They aren't as light as plastic.