Copper containers are actually great at killing bacteria. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3312355/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC33

Copper containers are actually great at killing bacteria. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3312355/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3312355/ But high levels can cause health problems, including kidney damage and possibly cancer. https://www.canada.ca/en/health-canada/programs/consultation-copper-drinking-water/document.html#2.1 https://www.canada.ca/en/health-canada/programs/consultation... Between dying of dysentery and risking long term health issues it's a simple choice. But unless your doctor specifically tells you to add more copper, you shouldn't be going out of your way to get it.