What guest gift does Polyphemus promise to give Odysseus?

Polyphemus, the Cyclops, promises to give Odysseus a special gift of a giant piece of cheese and a promise to eat him last, intending to honor him as a guest. However, this promise quickly turns sinister when Odysseus blinds Polyphemus, leading to a chaotic escape from the cave. The gift ultimately signifies the perverse hospitality of the Cyclops, contrasting with the Greek tradition of xenia, or guest-friendship.