His diet was restricted to 'liquids'. = He was on a 'liquid diet'.
They offered us snacks and 'liquid refreshments'. [='drinks']
the 'liquid' grace of the dancer's movements
(..) Yeah, I'm starting to. May l? "As I ate the oysters with their strong taste of the sea... and their faint metallic taste... as I drank their cold liquid from each shell... and washed it down with the crisp taste of the wine... I lost the empty feeling... and began to be happy." (..)1998 City of Angels