Years ago when the New Madrid Fault was getting attention in the news for the first time after a small tremor in Memphis, folks were told by the powers that be that bleach bottles were the perfect thing to keep water in since there was just enough residual bleach in an empty, unrinsed bottle to take care of any bacteria the water may contain. Til this day, when I empty one like I did today, I take it straight to the Berkey, fill it up, date it and stick it in the well shed. I wouldn't hesitate to use it to wash with and in a pinch would run it back through the Berkey and drink it. So far we've only used it for commode flushing and hand washing (newly filled bottles) but in a pinch would run it back through the Berkey and consume it. With a large creek and two wells on the property, I don't anticipate needing to but you never know.