Okay, did some nosing around. Here are some thoughts on it. One is really for a water dispenser, but still interesting, and the percentages seem to stay the same.
And, at the end, there's a fun article on reusing various bottles. I've done some of the things that they've mentioned, as you probably have, too! :-)
Cleaning Reusable Bottles, small
Reusing Jugs & Bottles
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