そのミルクは腐ってますよ。

that (something or someone distant from the speaker, close to the listener; actions of the listener, or ideas expressed or understood by the listener); the; um...; er...; uh...

milk

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

to rot; to go bad; to decay; to spoil; to fester; to decompose; to turn sour (e.g. milk); to corrode; to weather; to crumble; to become useless; to blunt; to weaken (from lack of practice); to become depraved; to be degenerate; to be morally bankrupt; to be corrupt; to be depressed; to be dispirited; to feel discouraged; to feel down; indicates scorn or disdain for another's action; to lose a bet; to be drenched; to become sopping wet

indicates certainty, emphasis, contempt, request, etc.; used when calling out to someone; used to catch one's breath or get someone's attention; yo!