Uber’s annual Lost and Found Index includes items left behind in autonomous vehicles for the first time.

Uber’s annual Lost and Found Index includes items left behind in autonomous vehicles for the first time.

Dentures and breast milk were among the unique things people have forgotten in Ubers, according to the company's annual Lost & Found Index.

Ride-sharing service Uber released its 10th annual Lost & Found Index, an accounting of the most common -- and most unusual -- items left behind.

And what do Donny Osmond and Lady Gaga have to do with it?

The ride-hailing company released its annual "Lost and Found Index" on Tuesday.

Even in a future of robot taxis, someone still has to return the things passengers leave behind.

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