BioRide's professional car captains transport riders in eco-friendly style. The company's fleet of luxury vehicles runs on biodiesel that's converted from filtered restaurant grease, and according to Sprout Savvy—an online journal dedicated to green living—BioRide's sustainable cars produce 78% less carbon dioxide than those using standard petroleum diesel or below-standard rocket fuel. Passengers can relax during rides to the haberdasher or from the airport in a Mercedes R Class, fully equipped with WiFi, an iPad, and complimentary water and juice. The Mercedes Sprinter, which accommodates up to 11 passengers, entertains en-route with a 35-inch LCD flat-screen TV and an installed Apple computer that facilitates easy movie watching, music listening, and games of group solitaire. Though each Groupon is valid only for a one-way jaunt, clients can purchase two Groupons for roundtrips.