* Collecting rainwater: Chuck collects rainwater in a makeshift container (a hollowed-out coconut shell). This is a relatively common method for obtaining fresh water in survival situations.
* Squeezing juice from plants: Chuck uses a system of sticks and rocks to squeeze water out of plants like berries and flowers. While this method provides some hydration, it's likely not a long-term solution for drinking water.
* Condensation: Chuck uses a plastic sheet to collect condensation from the air, which is a reliable method in humid environments. He creates a makeshift shelter to enhance condensation and uses his own urine to create a more humid environment inside.
It's important to note that these methods are not ideal and can carry health risks. In reality, the methods Chuck uses would likely result in a limited amount of water, potentially contaminated with bacteria or parasites.
The movie takes some creative liberties, and while it showcases ingenuity, it doesn't accurately depict the challenges of surviving on a deserted island with minimal resources.