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Re:Tips from Poland on Old-School Zero Waste (2019) by Polylactic_acid on Sunday February 02, 2020 @08:53PM (#22220817)
In this case you really do have to get the system absolutely perfect, not just good. It is unacceptable for someone to receive a bottle that contains any amount of dirt or other contaminant.

I'm not an expert in this so idk how difficult it is to ensure this but unless the system is perfect it can't be used.

Re:Tips from Poland on Old-School Zero Waste (2019) by jacobush on Sunday February 02, 2020 @09:06PM (#22220868)
It has worked with glass bottles in Sweden for I know many decades, maybe a century, unsure. Unfortunately glass bottle usage is down and plastic usage is up.
Re:Tips from Poland on Old-School Zero Waste (2019) by sgift on Monday February 03, 2020 @08:11AM (#22223804)
The German mineral water industry started using a standardized glass bottle in 1969, all of these are reused: https://de.wikipedia.org/wiki/Normbrunnenflasche

If we could do it 50 years ago, we can do it now. It's a solved problem.

Re:Tips from Poland on Old-School Zero Waste (2019) by TeMPOraL on Monday February 03, 2020 @02:50AM (#22222253)
You don't have to make the system perfect. You have to make it cautious. At any time it suspects a bottle may be too dirty or not getting cleaned for some reason, it should reroute it to manual inspection line and/or straight to remelting. So now you lose 30% of your yield, but the rest is clean and sterile. That's a good starting state, from which then you can optimize the contaminant detection.