if large,pints
if small,ounces
if medium,cups
cups
cm
Centimetres.
Grams
UV
They'd probably use millilitres.
gallons
cups
millimetres (centimetres could also be used)
liters or milliliters or cups.
The unit of measurement for milk is litre (L) in the SI.
cups
Litres and parts of a litres is used to measure milk.
You would use a millilitre or, equivalently, a cubic centimetre. A larger unit, which could be used, is a litre.
Probably centilitres.
A "can of coconut milk" is not a unit of measure! However, to give you the benefit of the doubt, had you said "How many deciliters in a 400ml can of coconut milk" then the answer would have been 4.
Anything under a quart I measure in milliliters.