By Andrew Ward Cannabis vending machines have been gaining ground in the U.S. and Canadian markets. In Colorado, for example, the first “anna” vending machines debuted with some 2,000 products, including flower, oils and edible options. Beyond that, vending machines and adjacent products alike need to create an efficient consumer experience, he added, citing how average transaction times for Greenbox shrank from just short of four minutes to under two minutes. In 2014, Vancouver dispensary B.C. Pain Society installed what is believed to be the first assistant-less vending option. Greenbox is touted as a robot that recognizes new and returning customers, creating a tailored CBD buying experience for each user, Johnson explained.