A Box of Milk or a Carton of Milk?
Should we say a "packet of milk" or "box of milk" or "carton"?
I'm not familiar with a "packet" of milk, but there are both a "box of milk," and "carton of milk."
These two can have somewhat different meanings:
A carton of milk usually refers to the picture above.
Cartons of milk need to be refrigerated.
A box of milk actually looks more rectangular and can be kept in room temperature.