Here's how the machine works, per the Post:
The machine, designed and manufactured in Portugal, looks like a typical deli ATM — but functions more like a vending machine. You put in dollars and receive bitcoins back on your phone.
Users first download a bitcoin wallet mobile app — such as BlockChain or Mycelium — and set a password. A black-and-white QR code appears. They press the phone against the ATM’s glass window so it can scan the code, then feed in cash.