Vending machines, like this one, selling medical marijuana have opened for business in Seattle in the US. This machine, at Seattle Caregivers, a medical marijuana dispensary, contains cannabis flower, hemp-oil energy drinks and other merchandise. The first purchase was for one gram of a strain dubbed Girl Scout Cookies for US$15. "It's a way to take something that has proven itself as a viable business model throughout the last century, and bring it into the 21st century," said Stephen Shearin, of American Green, which provides the machines. The company expects to expand to other cities and states where pot is legal as medicine.