"When one is balancing between 2 lorries doing the splits, fighting Bolo Yeung, promoting pisswater beer, or hoovering more beak than a poultry processing machine cleaner... you find yourself clenching your jaw a lot.
With this, I can use any metal drip tip I want, and hang it out my mouth while hanging out shirtless on someone else's yacht. Without damaging my Hollywood veneers. See what I did there? Why did you not laugh? I can be funny like Arnold and Sly. Please, buy my script, it's about an unknown martial artist who travels to... Wait why are you walking away?"
- an actual quote from JCVD
(It also pulls the mouthpiece off the Revolve stem, if you're not careful.)
On balance, I think I prefer a dedicated wpa, but this absolutely does the trick at a tenth of the cost, so you'd do well to pick one up, if you're undecided