I have a pressure washing company and I use the 1 gallon during the summer time if IM working all day, It will last me 2 days. The half gallon I use if im only working a couple hours a day
I bought a full size gallon. Figured I’d get the biggest and work my way down as needed. I honestly just leave the full gallon in my car and take it with me everywhere I go. I usually fill it up at any water station in front of grocery stores for 50cents. Sure as hell beats constantly buying plastic gallons from the store. Some times I add crystal light to switch up the flavor and make water more fun. Crystal light makes pitcher-sized pouches and I just dump one in my gallon and chug it!