What is a one-sentence summary of the following article?
Before you purchase your coconut, examine the surface of it to make sure that there are no cracks or mold on it. Healthy coconuts will be heavy because they are filled with liquid. Shake the coconut to see if you can feel the liquid inside. Coconut water helps keep the white flesh of the coconut from drying out.

Summary:
Buy a coconut that's free of cracks and damage.