In the States a college inventor has created an RFID-enabled coffee cup, allowing for wave-and-pay transactions in coffee houses without getting your wallet out.

While here in the UK NFC phones and RFID card systems have and are being trialled by both the London Underground and coffee shop type establishments, Chris Hallberg has taken a link out of the chain by adding the RFID chip directly to the cup.

The Smug Mug system will be in use sometime next year at a local Milwaukee coffee chain, Stone Creek Coffee, but Hallberg is hoping the concept might get picked up by larger companies looking to boost customer loyalty from time-pressed commuters.

The suggested price for the re-usable Smug Mug is $15, a price tag that include $5 credit for the relevant store.