For that use case bottled water is pretty much optimal. You can get food-grade steel jerrycans or plastic containers, but that's going to need more maintenance

For that use case bottled water is pretty much optimal. You can get food-grade steel jerrycans or plastic containers, but that's going to need more maintenance (regular cleaning/water replacement). E.g. FEMA recommends bottled water, or replacing water and bleaching every 6 months: https://www.fema.gov/pdf/library/f&web.pdf https://www.fema.gov/pdf/library/f&web.pdf