You’ll find several threads on this with a little searching. I use the 50 lb vittles vault: http://www.amazon.com/Vittles-Vault-50-50-Pound-Stackable/dp/B0002DJOOI/ref=sr_1_2?ie=UTF8&qid=1399490513&sr=8-2&keywords=vittles+vault.
I’ve got four and they work great. I’ve never paid this high a price however.