Another pic I’ve been meaning to get to…these are little promo items from the Google Bash at this year’s American Library Association Annual meeting in New Orleans. They were at the bar, and when you ordered a drink the bartender would pop one in along with the booze and ice. When you do that, they light up:
They have a couple of electrodes on the back that need to be bridged with some conductive item before they light up. Clever, and they gave the party a decidedly sci-fi aura, with everyone walking around with different colored glowing drinks.