Sherry Shum has embraced a new shopping routine after finding a smart vending machine near her home in Chai Wan. The 37-year-old retail worker uses her phone to scan a QR code, opens the smart machine’s door, picks up a bottle of Coca-Cola, an oolong tea and a pack of potato chips, closes it and walks away with HK$60 (US$7.70) worth of goods.