I love optimization and organization. So I was thrilled to discover the Mothers Milkmate Storage Rack ($26.99 at Amazon). It optimizes because the bottles hook up directly to most breast pumps and can attach to a universal nipple and collar to feed the babe directly. The system organizes by featuring a space saving storage rack designed to allow ten five-ounce bottles to rotate so that the milk is used in a "first-in, first-out" basis (i.e., you pull the first bottle out, and the others roll in behind it).
The Kosher certified storage system includes a heavy-duty wire rack, 10 polypropylene plastic bottles, 10 plug and cap sets (to eliminate leaking), and freezer grade labels.