Creating an USS Item

After you have set up your prefab as you need it later in game, meaning including every component, MonoBehaviour etc., you now add an USSItem component to your item in Unity.
At the moment, an USS item only has two public settings: A boolean value (checkbox) whether it spoils or not, and a float containing a spoiling rate multiplier (in case you want your item to decay slower or faster than other items in the same cooling place).
A very basic USS item which can only be bought and then thrown around looks like this:

After you set up your item to your satisfaction, its now time to create a shop to buy that item.