Just like soda machines spit out Coke by the can, automated pot vending devices may be the future of self-service marijuana purchases. amp;ldquo;Why wait 10 minutes in line if you can walk right over?amp;rdquo; Stephen Shearin, the president and COO of American Green, said. He demonstrated the first ever machine in Denver for CBS4 at the Doctors Orders dispensary. amp;ldquo;They press to start, and swipe their ID. It sends a message out to the legal age software we work with who checks against DMV and a national database to ensure that the ID is valid. amp;rdquo;That software is the same some pharmacies use to verify identity. State regulation says the vending machines can only be used inside a dispensary, not a recreational shop. Customers whose age is verified at the front door must still use their ID to access the vending machine.