Mine broke about a couple months in and I, like others have stated, found a substitute (soda bottle cap) and it has been in place for many years. I bought a gallon jug which I have used to refill my 32 ounce bottle (when it was about half empty) once in the last 6-8 years. I use mine until the PH goes out of range or gets crud in it (too many crickets for instance...before we got cats that is
) then pitch it and make a fresh batch...always have 5 gallons and a spray bottle on hand. Great product, packaging not so much.