People could soon be able to pay for things using their face.
Google is testing out digital wallets which do not even require the user to take their Android smartphone out of their pocket.
Instead the payment will be hands-free, with facial recognition used to validate any transaction.
Google product manager Pali Bhat said: "Imagine if you could rush through a drive-thru without reaching for your wallet, or pick up a hot dog at the ballpark without fumbling to pass coins or your credit card to the cashier.
"This prompted us to build a pilot app called Hands Free that we're now in the early stages of testing."
A small number of Silicon Valley food outlets are involved in the trial, including McDonald's and Papa John's.
The restaurants use Bluetooth and Wi-Fi to detect when a customer has Hands Free payment technology enabled on their phone.
When a person wants to pay, they simply tell the cashier "I'll pay with Google".
The cashier then asks for the persons initials, and uses the picture added to your Hands Free profile - which appears on their terminal - to confirm you are who you say you are.
Google is also experimenting with using cameras in stores, so that people can pay without having to be approved by a cashier.
Mr Bhat said: "At select stores, we’re also in the early stages of experimenting with visual identification so that you can breeze through checkout even faster.
"This process uses an in-store camera to automatically confirm your identity based on your Hands Free profile picture.
"All images captured by the Hands Free camera are deleted immediately."
The system is currently being trialled with a select group of users, but could be rolled out across the world.
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