With this trick question, most people will say "Milk," (which is not true) just for the fun of the questioner catching the questionee off guard. Cows drink water, not milk.
Evaporated milk plus water equals milk. It is reconstituted by combining a 12 oz. can of evaporated milk with 12 ounces of water. If you mean sweetened condensed milk, it is condensed and highly...