"VoiSec is a tiny button for recording, storing and playing short spoken messages with a good quality of sound." Capacity: 1 minute of playback with good quality. Runtime: over 500 playouts of a 30 sec. message. Power supply: 2 replaceable 1.5 volt batteries. Attaches to any surface with a double-sided adhesive. New messages can be recorded on the top of old ones.
If they are cheap enough (and the site doesn't mention pricing), it is easy to imagine these beauties on posters, POP displays and packaging.