I always answer no anyway, which is also the answer to 'have you had anything to drink?' As soon as you say yes, a few, that's it lol.
California police can no longer ask you this at a traffic stop starting in 2024
Potentially millions of California drivers have been asked the same simple question by an officer after being pulled over: “Do you know why I pulled you over?” However, starting in January 2024, officers cannot start the interaction with that question and instead must state the purpose of the traffic stop before asking any other questions. […]