A Los Angeles-based builder of hydroponic vertical farms has unveiled a digital tour of one of its greenhouses.

Local Roots Farms converts 40-foot shipping containers into hydroponic farms. The company began commercial production of lettuce in September 2015.

Each container produces the equivalent of four acres of outdoor production, according to the company.

In the digital tour, available on Local Roots’ website, users can navigate through one of the containers in which lettuce is being grown.

Local Roots crops are sold 100 miles or less from they’re produced. They use 97% less water than conventionally grown crops, according to the company.

Local Roots lettuce is currently being sold at Mendocino Farms and Tender Greens restaurants in Southern California and at severalarea farmers markets.

In July, the company exhibited for the first time at the Produce Marketing Association’s Foodservice conference and expo in Monterey, Calif.