reference plastic water bottles.
reusing plastic bottles can cause severe intestinal discomfort & problems.
in my opinion plastic bottles can be used once after the seal is broken. after the bottle is empty it must be disposed of, which is a huge environmental problem.
plastic boyttles which are "un-leaching" must be thoroughly cleaned between each filling.
personally i filter tap water with a pur filter and drink only from glass containers. mason jars can travel well.thoroughly cleaned between each filling.

reference plastic water bottles.
Reusing water bottles is the practice of refilling and reuse of plastic water bottles designed for one use, with tap water for multiple uses.

Reusing single-use bottles is a common domestic practice. Typically the bottle is washed out with warm soapy water after each use. Periodically a bleach solution may be employed to kill bacteria. Washing and re-using bottles cuts down on waste and landfill, and drinking tap water is much less resource-intensive than buying commercially bottled water.

Thirteen per cent of 75 bottles contained bacteria exceeding the Canadian Drinking Water Quality Guidelines, and nearly nine per cent had fecal coliforms. Overall, more than 64% of the samples exceeded the drinking water criteria for heterotropic bacteria.

Samples of available drinking water sources showed that they were below the detection limits for these bacteria, and the researchers concluded that the contamination in the bottles probably arose from students not washing their hands, and that the students may be better off drinking from water fountains at the school.

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