Clever! I'm not sure that the Police were envisioning a plastic screw top bottle when they sang that song, but it works for me. Their fault for not being more specific.
@stray_shooter Thank you Ron for your comment, tried putting the message in a glass whisky bottle could not get the note legible, resorted to cutting a slit in the back of the plastic bottle and sliding my message inside, another engineering solution to the problem, lol:)
