3-Pack. The CleverCrate® Milk Crate has the benefits of a traditional milk crate with added space-saving ability to store collapsed when not in use. With integrated rails for file storage, it can haul up to 50 lbs of tools, gear, garage clutter or children's toys. Designed for exceptional durability and functionality, once open, the crate locks into position making it ideal for stacking or on-the-go transport. The best part, the CleverCrate® Milk Crate folds flat when not in use and nest together making it a super space-saver.