The Frankfurt Airport recycling bank somehow manages to make giving up bottles of water and cans of soda to security fun. The German airport's new recycling banks make it easier for passengers to gulp down their drinks by incentivizing the process. The recycling bank lets flyers donate the proceeds from their recycled can or bottle to a charity of their choosing.
There are currently three charities supported by the Frankfurt Airport recycling bank: the World Wildlife Fund, a local food bank and an air-based charity that provides humanitarian aid. Should donors not pick a charity, then funds are automatically sent to the WWF. The Frankfurt recycling bank is a great way to get people to both donate to charity and to conform with security regulations. After all, it's hard to argue with airport regulations when they're enforced in the name of charity.