Great tips, thanks! I was considering switching to filtering water for home use, but the thing is — good filters (like Brita) are non-recyclable. The filters which are screwed on the tap are practically useless: they don’t clean any organic contamination, only solid particles (basically a mesh). I opted out for bottled water — yes, bottles are plastic, but the German Pfand (deposit) machines take them back and since this plastic is high-quality and sorted, 99% of it actually does get recycled (and made into new bottles, rather than burned or shipped to Asia). Interestingly, buying water in glass bottles is not necessarily better for environment — they must be cleaned and shipped back to manufacturer (hence large CO2 footprint). Maybe there are better solutions to the clean water problem, would be happy to hear.