This thing is very convenient and helpful. I use it more as a soft mouth piece and waterpipe adapter when I'm away from home and need something more rugged. At home, I prefer a glass adapter for my dynavap instead. This mouth piece works as well as the glass and if I had to choose one, get
this due to its versatility and relative.industructability or be like me and order both since they are fairly cheap. I will say this is very easy to throw away by accident, as was the fate of my first ine.

Highly recommend this trusted merchant. That carry both common and hard to find accessories.