Originally posted by: AnitaPeterson
Originally posted by: paulxcook
Originally posted by: Zoblefu
I've heard (possibly BS) that the plastic used for those bottles can slowly "come off" into the water as it is filled, refilled, washed, refilled, etc, since they were not made specifically for that purpose the plastic can be of lower quality to make the bottles cheaper.
No idea if it's true or not, but that's the reason I had heard about not re-using water bottles.
I have a feeling that if this was true and it was harmful, someone would've sued someone else by now. There are no warnings on the bottles to not reuse them. At least none that I've noticed.
Actually, there's SOME truth in that statement, although it's terribly distorted...
Let me clarify the issue.
The various plastics used for different containers may have a different shelf life. They DO, indeed, start to break down and decompose, in very microscopic quantities - and they may end up in your system.
Have you ever seen an old plastic bottle, left untouched in a garage or an attic, become opaque, taking a "matted" appearance, as if it was sanded with a very fine abrasive sponge? that's exactly it - those bottles are starting to slowly decay.
Take a peek at any plastic bottle (usually at the bottom). You will see a triangle with a number inside it. Most of the times, that number is 1 or 2... sometimes it's 4 or 5.
That particular number DOES indicate the longevity of the material - as you can imagine, 1, being the lowest. AFAIK, the safest bottles to use in the long run are marked 5... you can find them in various sports/outdoors stores. I don't remember ever seeing a "6".
And yes, it helps to also periodically wash the damned thing...
Rule of thumb: if you fill the bottle with water, and you see bubbles on the surface that last for more than 1 or 2 seconds, that water is probably not clean. And if you see foam, instead of bubbles, it's DEFINITELY not clean