You buy some drygoods food. Its in a bag inside a box. The contents may have settled during shipping so the box is really 1/2 full. The box has printing on it the ink may or may not be vegetable based. The bag is made out of any number of materials. This box was part of a larger case on an even larger pallet.
This covers the shelfspace, advertising, convenience, longevity of the product.
You have a bin with a lid and a scoop, the product comes in a case size box with a large bag. You may or may not be able to see who the manufacturer is and everyone who lifts that lid may be adding to the contents. Seeing a grubby five year old digging through the beans would give you pause. There may or may not be an indication of how long the product has been there.