So, which book are you referring to?
In the play Antigone, Teiresias is a prophetic character who, despite being blind, possesses significant foresight. He reveals multiple indications of his prophetic abilities before sharing his actual prophecy.
His role as a prophet is evidenced by how he interprets signs. These signs indicate that the gods disapprove of Creon's actions. Teiresias notes he has observed the "carrion remains" of birds and dogs, associated with the tragic fate of Oedipus' son. The gods seem unsatisfied with the Thebans' offerings, and the throats of the birds are filled with the blood of Polyneices.
All these signs suggest that the natural order is disrupted. We discern that the gods condemn Creon's refusal to bury Polyneices and see his actions as transgressing the laws governing the living and the deceased. As a result, Teiresias warns that retribution will come for someone in Creon's family.
Removing the option to buy a certain size of soda is neither fair nor lawful.