CHICAGO (WLS) -- Supporters call it the future of delivery, but critics worry about sidewalk congestion. Either way, there's a lot of talk about food delivery robots that are popping up more and more in Chicago neighborhoods.

The boxy robots on wheels, from companies like Coco and Uber, have hit the streets in several Chicago neighborhoods.

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They've gone viral on social media, with posts documenting their travels, delivering food from a restaurant to the person who made the order.

Sometimes, they have mishaps, like getting stuck in the snow.

The battery-powered machines use cameras and sensors to navigate sidewalks, cross streets and avoid pedestrians.

But Caity Collins says she had too close of an encounter with one.

"The

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