Open the refrigerator, click on the storage box, put various items into the storage box, click on the right, the storage box is back in place, the items are finished, the refrigerator is just full or not enough to count customs clearance, if the refrigerator is full of things have not been stored, do not give customs clearance.
WASD:Click on the item that needs to be placed in the refrigerator to put it in the refrigerator, and before that, you need to click on the storage box in the refrigerator.