Fun Buttons - Press Yours Now
These shutter buttons are in that class - they go onto the cable release sockets of Leicas, Zeiss Ikons, Voigtlanders, and Fujis and you press them down with your finger. Or your nose, at a certain stage of the party...
They might ease the shutter release and give you a smoother shot and less vibration and finer definition and a chocolate milkshake and world peace, but I suspect they are still just to look cool and make you feel happy.
And for $ 19.95 that seems to be a pretty good deal.