2014 Ford V-10 Dropped plastic cap down oil fill tube

When I was a teenager I worked at a full service gas station and a guy came in with a new car he had just won at a school raffle. He had dropped a plastic cap in the radiator and had been fishing for it for a couple hours. I was able to catch it after about 10 minutes.

I would suggest letting the motor idle and look in the hole to see if it will float by.