First you need a freezer. A few years ago we needed to replace the refridgerator and one of the questions asked was "How big"? So I got out a tape measure and determined the biggest size that would fit in that space -- "That big".
Then we got rid of one of those salt type water softeners that imo are really counter-productive and we had this big empty space in the garage. Sears had a freezer to fill that void and with that our cold food storage capacity tripled. Get one.