Boston Mayor Thomas Menino has unveiled a vending machine that dispenses bicycle helmets for users of the city's bike sharing service, a street kiosk he said was the first of its kind in the country.

Menino said the so-called HelmetHub machine, attached to one of the city's Hubway bike rental stations at the intersection of Boylston Street and Massachusetts Avenue, will allow users to rent and return helmets, adding a measure of safety to the service. Full article here from the Trib.