It is problematic to make one that is both sleek and light and easy to manufacture, I am sure. I am not sure if the Boss and the other suspect are doing anything. I cobbled together a contraption from various parts three years ago. Thing is that the simple mouthpiece plug works about as well. Y'all of course know that Luis took a straight mouthpiece and made a cutoff mouthpiece by slicing it so that it can rotate closed. But, most of us seem to much prefer the curved and hourglass types. I know I do because the straight hurts my front teeth implants worse than those dang single hose jobs do.
I think there are some plugs in the vdh store? I would look but every time I go in there I have to buy something, I already know I need the envio-silicone for my Conshelf Supreme.
Loop the plug to your left shoulder D ring or some place like that.
Merry Christmas,
Nem