I'd like to know with grave answers.

AHHH. I'm not certainly about the answer. But I hope not. Cause if that's true, I'm screwed.

i higly doubt it lady

Question sounds weird and very far-fetched. In other words I don't know what you mean.

my teacher said that freezing it causes pieces of the plastic bootle to obtain into the water soo...

No, the opposite is what we need to be concerned about. When plastic gets hot (eg. microwaved, in a hot car, in the sun for a long time) the heat can cause the plastic to leach chemicals, some carcinogens, into the water, or whatever else you have in the container. To be on the harmless side, you should never microwave food in plastic, or put plastic ware in the dishwasher, even though some plastics are "theorized" to be harmless - we just don't know for sure, so err on the harmless side! You can find many of info. about plastic safety on green or eco living websites. The followin is from greenfeet.com.



"The Problem:

These findings were the result of a study by Dr. Patricia Hunt of Case Western University in Ohio that questioned the use of polycarbonate plastics such as Lexan.



In1998, Hunt discovered that plastics made from polycarbonate resin can leach bisphenol-A (BPA), a potent hormone disruptor. BPA, a chemical found in epoxy resin and polycarbonate plastics, may impair the reproductive organs and have adverse effects on tumors, breast tissue development and prostate development by lowering sperm count.



BPA can be leached into the water bottles contents through common wear and tear, exposure to heat and cleaning agents. This includes leaving your plastic water bottle in your car during errands, in your back pack during hikes and running it via your dishwasher and using harsh detergents. And, a 2003 study conducted by the University of Missouri published in the journal Environmental Health Perspectives confirmed Dr. Hunts' study conclusions but also found that detectable levels of BPA leached into liquids at room temperature. This means just having your plastic water bottle sitting on your desk can be potentially harmful. In this author's humble opinion, the best thing to do is to avoid plastic altogether. (Side note: baby bottles made from polycarbonate plastics have quietly disappeared from the market despite industry assurances that polycarbonate plastics are safe)"