If you are looking for a stand alone tub, you can use Sterilite, Vision, or Rubbermaid tubs. You can them at places like Target, Wal-Mart, K-Mart, Home Depot, Lowes, some of the dollar stores, or other places like those. If you think that one day, you might expand into a rack system, I would suggest Iris tubs from Reptiletubs.com.