You do not receive bushels in a truck. You receive a receipt from an exchange-licensed elevator, vault or tank farm, which entitles you to the goods and obliges you to pay storage from that day forward.
Holding receipts is a real business decision: storage, insurance and financing accrue daily, which is the practical meaning of cost-of-carry.
Example: taking delivery of five corn contracts leaves you with receipts for 25,000 bushels at a registered Illinois River elevator, plus a storage bill of a few cents per bushel per month until you sell or ship them.
Related: physical-delivery, registered-and-eligible, storage-cost, cost-of-carry, delivery-notice