How can extract water from a cactus plant?

Question

How can extract water from a cactus plant?

Answer 1

A means of obtaining water from a cactus in the desert is :

Dig a hole in the sand.

Place cut pieces in the hole with a cup in the center.

Fasten saran wrap over the hole with a small stone in the center to weight it down

The sun will heat the cactus, water will evaporate, t will collect on the saran because it is cooler on the other side, and drip down off the center into the cup.