Why You Should Never Leave a Water Bottle in Your Car: A Complete Guide

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Beyond the physical risk of focused sunlight, there is an invisible change occurring when plastic meets high temperatures. Most single-use hydration containers are made from a material known as Polyethylene Terephthalate (PET). PET is lightweight, durable, and highly convenient for packaging, but it is not designed to withstand the extreme environment of a baked car interior.

The Breakdown of PET Structures
PET plastics are engineered for normal storage conditions—room temperature or refrigeration. When

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