Catching a glimpse of the Food Runners bicycle courier pulling a trailer fully loaded with trays of food might become something of a downtown San Francisco rite of passage. Food Runners, established by Mary Risley in 1987, takes food that would otherwise be thrown away and delivers it to needy people at Community Awareness & Treatment Services, A Woman's Place, Cityteam Ministries and Door Clinic, among many others. With the amount of donated food now coming in, Risley hopes to expand deliveries to after-school programs as well. A year ago, Risley estimates that Food Runners was picking up 10 tons of food a week; today, that number is up 50 percent, to 15 tons. There are about 100 new donors, and nearly all of them are tech companies - familiar names like Twitter, Zynga, LinkedIn, Uber, Google, Adobe and Airbnb, just to name a few, plus caterers like Cater2Me and ZeroCater that service small startups. "Millennials have found us," says Risley. "Anything you say about the Millennials being out of it is not true. Well, maybe they are out of it, but not when it comes to generosity." ZeroCater, which caters to eBay and FourSquare, among others, estimates that a company usually orders about one pound of food per person. Since the head count varies from day to day and extra food is always ordered, a good amount is left over. That is where Food Runners comes in. The company - be it caterer or restaurant - calls Food Runners. The food gets picked up and delivered the same day. Food Runners' No. 1 message to the public should be clear, says Risley: Don't throw food away.