I'm in the planning stages of a duck pen/house. They aren't going to have anything very elaborate, but I need a way to store straw and food bags. Rubbermaid used to sell huge hinged plastic storage chests which were pretty close to waterproof that would have been great for a bale of straw, plus another one for bags of seeds/oyster shell/etc. Unfortunately, it doesn't look like they're made anymore, and I'm at a loss for a cost-effective method for storing all of my "gear" without a shed.