Because there are really bad chemicals in plastic. Don't freeze water bottles or leave them out in the sun because the chemicals leak into the water that you consume.
Nalgene water bottles are polycarbonate plastic water bottles that contain BPA. BPA has been shown to be carcinogenic in animals at low levels.
Aluminum is not known to cause cancer. However, aluminum can dissolve into water, and too much aluminum is not a good thing for a variety of reasons. That is why most water bottles are made of stainless steel. However, it's better then platic, and platic is made from oil, and because of this, it cost way to much to make plastic, the metal bottles are better! :) Not just for the economy and environment but are better for your health! :)
There is no real research saying that water bottles will cause cancer if reused/left in cars on hot days. This rumor was originally a hoax email sent to people, and some graduate student using it as the thesis for her paper.
The answer is yes. You can definitely make a floating raft out of plastic water bottles. You would have to make sure that you had enough plastic bottles to complete the task. For step by step instructions visit http://www.wikihow.com/Make-a-Raft-out-of-Plastic-Bottles.
Plastic.
U need water bottles tape and milk or mountain dew jugs
Water bottles, are pretty good.
The answer depends on the capacity of the bottles of water!
We can make a pen stand from waste water bottles buy cutting it.
To effectively sterilize water bottles, you can wash them with hot, soapy water and then rinse them thoroughly. Alternatively, you can use a solution of bleach and water to disinfect the bottles. Make sure to let the bottles air dry completely before using them again.
Sustainable water bottles come in many forms from a number of different companies. Companies like Sigg and TapIt make bottles out of sustainable materials which do not leach chemicals into the water.
800 bottles, each containing 20 oz (Imperial) will make 100 Imperial gallons.