Needed to clean my coffee mug easily so through a teaspoon of PBW in my Kleen canteen! This stuff worked fast to start removing the buildup, within seconds I could see coffee grim float to the surface! Cool
It truly is amazing stuff. A while back my carbonation stone seized up solid. I thought I was out of O2 but even a new tank wouldn't flow through the 2 micron stone. A quick soak in hot PBW brought it back from the dead.