Heavier = More?

Which one of the following most accurately expresses the conclusion drawn in the consumer advocate's argument?

Consumer advocate: Even if one can of fruit or vegetables weighs more than another, the heavier can does not necessarily contain more food. Canned fruits and vegetables are typically packed in water, which can make up more than half the weight of the can's contents. And nothing stops unscrupulous canning companies from including more water per can than others.

Answer: The heavier of two cans of fruit or vegetables does not necessarily contain more food than the lighter of the two cans contains.

The heavier one could just contain more water. This is our main point from the first sentence.