deadstock

Merchandise that has not yielded any use yet: from the view of the businessperson, one that has failed to be sold or processed and is now stowed away for possible sale or manufacturing at a later date, from the view of the consumer, a piece that has been obtained but not found application and is now—perhaps even with original labelling or packaging—stored for future ideas.

Agricultural implements and stored produce, distinguished from livestock.

(slang) To store in appropriate packaging for later.