Is it the newest Disney movie?
Is it the hottest energy drink?
Is it all non-biodegradable items in a landfill?
According to Merriam-Webster on-line -
Etymology: adjective; capable of being consumed
Definition: something (i.e. food or fuel) that is consumable — usually used in plural
This term is frequently being used to describe items that are needed to use a product, e.g. photo paper and ink jet inks for use in a photo printer, that aren't included in the initial price/package with the item.
Why this term matters:
When purchasing a photo printer, consider the cost of consumables when factoring all of the costs associated with the operation of the printer.
Also, keep in mind that your cartridges are recyclable when you're done with them, and can even benefit your local school or charity.
Photo from Gizmodo