Yes, shipping containers are made for transporting goods across the oceans – often on decks of ships. They have heavy duty rubber door seals which keep out the elements. Used shipping containers sold into the storage and the re-used market can have damaged door seals or damage to the steel roof or sides but most companies selling used containers will ensure that they are inspected and repaired before they are delivered or released. There is a strong market for new and used shipping containers so expect to pay a fair market price for a good wind and watertight container.