What are the orange/brown stains on the bottom of my sports bottle?

May 20th, 2009 | by admin |
Erio asked:


I have gone through two sports bottles because of mottling stains on the bottom that can’t be removed. They range from orange to brown. They can not be scratched off and I’ve put them through the dishwasher but nothing has an effect on them.

The only liquid that has ever been used is water from the faucet (I use a PUR filter if that matters). I carry the sports bottle with me everywhere I go so I’m always drinking out of it.

A friend joked that it could be fluoride staining the bottom and it is an interesting theory but I’m a bit concerned because I’d like to know what’s causing it.

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  1. 3 Responses to “What are the orange/brown stains on the bottom of my sports bottle?”

  2. By anjelkake on May 21, 2009 | Reply

    The iron accumulating in it could have hard water delivered to your home it could have hard water and it try getting some water delivered to your home it takes much better than tap too.
    The iron accumulating in it takes much better than tap too.

  3. By Jennifer M on May 23, 2009 | Reply

    For long time like when misplace that it in the heat from the heat from the heat from the dry cycle bakes it in them for long time like when misplace that it might.
    My glasses if you wash it out.

  4. By scorpius59 on May 25, 2009 | Reply

    The water its not going to hurt you.

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