Magnum P.I. was going to use one to assassinate a visiting Vietnamese official he remembered from the Vietnam War. Don't remember the specifics as to why, I just remember him creeping through the brush with his rifle and the soda bottle on the muzzle.
I still have lots of the old gun magazines from the 1980s. The one about the soda bottle silencer is in FIREPOWER July 1984.
“The Pop See Challenge” by Richard Stanley. Page 54. The adapters were made by SWD,Inc of Atlanta Ga.