Sound in a Jar

If someone say something into an object, like a jar, and then close it, the sound will be preserved and released upon opening or the object’s destruction.

Literature

 * Soul Music has sound-capture boxes,

Live-Action TV

 * In the Daily Show John Stewart does swears into a veterans affairs swear jar, in a later episode, original airdate 5/19/2014 he opens the jar and (censored) profanity comes out.

Western Animation

 * In SpongeBob, this happens in Naughty Nautical Neighbors, with bubbles
 * In The Amazing World of Gumball Darwin is underwater and speaks, bubbles come out, pop on the surface, releasing his words for gumball (and us) to hear.