I noticed this quote which is particularly apt. (@Praxis, feel free to add to your answer if you like.)
From the first season episode "The Forsaken":
LWAXANA: I know. I'll have Quark send one of his minions with our basket. We'll have our picnic up there.
ODO: Madame Ambassador.
LWAXANA: Lwaxana.
ODO: I don't eat. This is not a real mouth, it is an approximation of one. I do not have an esophagus or a stomach or a digestive system. I am not like you. Every sixteen hours, I turn into a liquid.