The Water Bottle Silencer does work. It is used to make water bottles dink like a whisper, and it’s really quite spectacular to see in action! Just put the adapter on top of your regular water bottle and attach the rubber tube underneath; then you’re ready! When you press down slowly and pull up slowly (with one continuous motion) it manages to remove all that annoying noise that regular gas station 2 liter bottles produce when they’re being opened. They have been tested scientifically as well, so there really isn’t anything left to debate here – yes, I can confidently say from personal experience that this product does work!