She sits him down and mixes the bowl at her own table. Cheese and grain and honey and wine and a few spices he cannot name. The hospitality of it is the trap. You cannot refuse a host’s bowl. He drinks it down to the last mouthful, fortified by Hermes’s herb. Then she touches him with the wand and waits for him to drop, and nothing happens. The bowl is the polite face of the spell. The wand is the bare face. Strip away the cunning of the hospitality and the trick is much uglier. She is feeding her victims their own undoing one mouthful at a time.
Circe's Bowl / Potion
Cheese, grain, honey, wine, spices Odysseus does not recognise. She mixes it for each guest. The wand only works after they drink.