Many studies have shown, when plastic bottles contact any heat source (sunlight, the interior of heated cars, microwaves, hot water etc.), toxic chemicals from the plastic will be released into your drinking water. By using glass, you will protect your health and help conserve the environment as well. It is colorful, very easy to carry, and leakproof. Great for schools and travelling! You can still drink pure and non-toxic water even after you leave this bottle in your hot car for long time!