How does this thing work. From the reviews it seems that the reg fits inside it. Is that correct?
GORDON B The mouthpiece fits inside with the Skum-Ball clipped to your BC, with a quick tug it comes free. Try it a few times your reg's mouthpiece can fit and pulling it free won't detach the mouthpiece from the regulator.
W K The mouthpiece of the reg fits inside it. Since the mouthpiece is also plastic, it comes out easily -- but only if you need it. It is a great way to keep the extra reg tethered to your BC. Trying to coil the extra line and fit it through a loop is too much work. It also helps keep the mouthpiece out of any muck.
ROBERT M Only the mouthpiece fits in. Squeeze the sides of the mouthpiece together and push into the opening of the scumball. A tug on the reg. or hose will release it from the holder. Works well, no complaints so far.
BILLY N The mouth piece stuffs inside it. Some are a little tight, but works OK,