Gallon lasts me over a year. I bought a sweet pump spray bottle as per Amazon recommendation. Very handy for my forge area, equipment maintenance etc. I have a couple spray cans for tight areas, nut and bolts, battery terminals, boat stuff etc. it isn't cheap but the rust busting abilities, creep and protection is the best I have found. Spray cans are 12 oz and run 15-20$, a 128oz gallon is a deal.