Most other manufacturers wouldn't provide any funnel. At least Honda did. I think the cap-less fuel has 2 little spring loaded doors... the first one you see and the other behind that one an inch or so more in.
Staying on the subject have you guys noticed the emergency release for the fuel fill door incase the button on your door doesn't work in the rear driver side cubby.My Ridgeline had one behind the rear driver side seat.
Remember: The funnel can also be used for siphoning fuel out of the fuel tank - for when the lawn mower fuel is at empty, of course, and one doesn't want to make a special trip to t he local fuel station. At least I surmise that can be done.