Goods must be both existing and identified before any interest in them can pass. Goods which are not both existing and identified are "Future" goods. A purported present sale of future goods or of any interest therein operates as a contract to sell.
There may be a sale of a part interest in existing identified goods.
An undivided share in an identified bulk of fungible goods is sufficiently identified to be sold although the quantity of the bulk is not determined. Any agreed proportion of such a bulk or any quantity thereof agreed upon by number, weight, or other measure may to the extent of the seller's interest in the bulk be sold to the buyer who then becomes an owner in common.
R.C. § 1302.01