Black Friday ... about it collecting mold in the hard-to-reach areas.” Owala’s 40-ounce tumblers come in 10 colors, and like so many of our favorite reusable water bottles, have layers of ...

Mold and bacteria could be growing in the lid, straw ... Why You Need To Wash Your Stanley Tumbler or Water Bottle Regularly When you notice black mold or a slimy film growing on your water ...