A milkshake is not just metabolic product of milk, but a state of being of that milk. It comes into existence upon the right material conditions of temperature, preparation, and corporeal collection in a glass. We must root our analysis in the material forces, not the dogmatic ideology of immortal concepts like 'milkshake' that are somehow independent of the material reality. Yours is a revisionist concept that leads to reactionary thinking. Will we be forced to recognize such reactionary forms of metabolic milk product like foam for latte's as milkshakes? When I serve up a slice of pie with whipped cream, have I in fact served up a slice of pie with milkshake? No, to imply as much is absurd. A milkshake spilled upon the floor becomes mere spilled milk (no tears necessary), a milkshake that sits on the counter long enough becomes merely warm sweet cream. We must be comfortable with the idea of milkshake as a mere representation of the process of milk in a long and ever evolving process.