On average, it takes 1.32 litres (L) of water to produce 1 L of bottled water. This includes 1 L of ingredient water and 0.32 L of water used in facility processes such as treatment, bottling, and maintenance. Small pack facilities (facilities that package water in containers between 8 oz. and 2.5 gallons) use the least amount of water (1.26 L per 1 L), followed by mixed packaging facilities (1.46 L per 1 L). Facilities that package water for home and office delivery in sizes of 2.5 gallons to 5 gallons use the most water (1.56 L per 1 L).