Most squirrel-proof bird feeder?

As we approach the winter months, I’d like to welcome more birds into our garden with a bird feeder. However, I have an archnemesis in the form of a squirrel called Cyril. This guy eats EVERYTHING (including many of my beloved plants) and will stop at basically nothing to get even the smallest snack. As a result he is extremely large but also strangely nimble despite his size. Is there a birdfeeder you know of that stops even the greediest yet most athletic squirrel?