The Broad Branch Market, in Chevy Chase, said service remains a top priority.
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"It's a big responsibility, we feel like we need to be here," owner Tracy Stannard, told WJLA.
For three days, Stannard has been using four 45-pound robots to deliver goods from her market to neighbors within a mile of her store.
The delivery service is free, as part of a beta test with the company Starship, and a modern twist to the store that has been in the community for a century.
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"It has been great, people rely on us for groceries," Stannard said.
The market has also instituted a 10-customer limit inside the store.
One customer said she received her order from the robots in less than 30 minutes.