Full Idea
A table should not be identified with the set or 'bundle' of its properties, nor with the subset of its essential properties. Don't ask: how can I identify this table in another possible world, except by its properties? I have the table in my hands.
Gist of Idea
A table in some possible world should not even be identified by its essential properties
Source
Saul A. Kripke (Naming and Necessity lectures [1970], Lecture 1)
Book Reference
Kripke,Saul: 'Naming and Necessity' [Blackwell 1980], p.52
A Reaction
You identify the table by what's in front of you, but the essence might be relevant to deciding how far this table could change and remain this table.