Once the money has been submitted a notifying tweet is sent with all the details.
The beer offer can be rejected by refunding the 5 dollars or by simply ignoring the tweet.
Users can send as many beers as they like, but Tweet-A-Beer supports responsible drinking and the transaction limit means only one beer can be sent at a time.
Tweet-A-Beer was brewed-up by Portland communications company Waggener Edstrom and ad agency Tenfour "to ensure that distance, agoraphobia, and gang rivalries no longer prevented people from sharing a pint," the Tweet-A-Beer website said.
"Users can use the 5 dollars for whatever. (But seriously, we recommend using it for beer, because it's beer)," the website added.
This application is only available in the US at this stage.