Milk is both. Reusable delivered glass bottles are pints. Small supermarket plastic bottles are 568ml (1pt). Larger ones are either 1136ml (2pt) or 1l. Big ones

Milk is both. Reusable delivered glass bottles are pints. Small supermarket plastic bottles are 568ml (1pt). Larger ones are either 1136ml (2pt) or 1l. Big ones are 2l and 3l.