Your thumbprint might soon be the key to an afternoon candy bar. A Massachusetts based vending machine company is joinng the growing ranks of companies that are field-testing new technologies.

Next Generation Vending and Food Service is experimenting  with biometric vending machines that would allow a user to tie a credit card to their thumbprint.

"For a certain demographic that is pretty cool," says company president John S. Ioannou.

Read more at: http://www.myfoxny.com/dpp/your_money/consumer/vending-machines-of-the-future-20100807-lgf