I think this might be the best purchase I've ever made that's detailing related. It's so annoying to spill when you're trying to pour from a gallon. It hurts more when it's an expensive chemical like ONR. With this, I might a spill a drop or two compared to like half a ounce before. This product has turned a horrible, annoying experience into a pleasant one. It will end up paying for itself in product savings. Buy it and you will not be disappointed.

These made pouring product from a gallon jug 100x better. No spill. Only problem I had was them threading onto the jug unevenly. It took some work to get them to sit and thread flush. Maybe it was the P&S gallon jugs that were the problem I don't know.

They work I just wish they included a little rubber stopper because you will have some leakage after closing the valve. They don't leak over time, just a little bit after filling a bottle.