This self-driving car could deliver groceries to your doorstep

They may resemble giant metal toasters on wheels, but these strange-looking vehicles could one day save you a trip to the supermarket. The American grocery store chain Kroger is teaming up with Nuro, a Silicon Valley-based robotics company, to test a fleet of robotic cars this fall in a yet-to-be-announced city. The new autonomous technology is designed to meet changing demands in the grocery market. "Our customers are increasingly wanting different ways of fulfilling their food and shopping needs," said Yael Cosset, Kroger's chief digital officer. The deliveries will be carried out by Nuro's R1 car bots, which have a top speed of 25 miles per hour, stand 6 feet tall and measure about "half the width of a Toyota Corolla," Nuro CEO Jiajun Zhu told NBC News MACH in an email.