These heavy-duty, insulated containers feature 2" thick polyurethane foam insulation. Use them for hauling fish, shipping seafood or as a holding tank. The containers are stackable up to three high when full of water and have an adjustable "Y" clip tie-down system that secures the lid (included). Smooth interior is seamless, easy-to-clean, molded polyethylene with a 2" threaded drain plug. USDA/FDA-approved. Ship from factory, freight collect only.