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What is the purpose of cling film?

The cling film keeps foods fresh by protecting them from the air which can expedite spoiling and oxidation, preventing unwanted drying, and preventing undesirable moisture absorption. They can also help keep food odors contained.

Cling wilm also known as food wrap and saran wrap, is a thin plastic film commonly used for sealing and securing food items in containers to keep fresh. Food Plastic wrap is sold in individual rolls or more typically sold with a roll in a box that has a cutting edge on it.