I am sure we could all use the Stop Talking cards to silence those who just don't know when to stop flexing their vocal chords. After all, those people can be found everywhere, from work to parties, to buses.
Designed by Allison Riley, the Stop Talking cards provide an elegant and "somehow polite" way to essentially tell someone to shut up. They are the size of standard business cards with immaculate letterpress work in an "elegant and almost restrained typeface," as if to minimize the insult.
$8 gets you an abstract black box with 25 cards, giving you 25 chances to see that priceless look on the face of the recipients.