Oral Tampons

   I think I have an idea for an invention - an oral tampon. If someone begins to go off on a tirade or babble you to death, you would simply insert the oral tampon into their mouth. The cotton would react with the saliva causing the tampon material to expand, just enough for them to stop talking. Kinda like Great Stuff.
   I know this is entirely antithetical to my normal viewpoint, but sometimes ya just take a break from reality. So anyone have any ideas for what brand name to give it?

Courtesy of Dan, a related audio clip from the HBO series Deadwood (not safe for work):
Your mouth looks like...