[wdfifteen]

That's pretty cool.
I stopped using funnels when I started getting "help" with the lawn mowing. I was the only one who bothered to wipe the funnel out and put it away after using it. My "helper" had no problem sticking the funnel, with the dust and dirt than accumulated on the wet funnel, back in the tank at the next fill-up. Never mind getting her to wipe the top of the tank off before taking the cap off. Or check the oil - ever.
I try to take care of all the refueling now, but sometimes someone "helps me out" when I'm not looking.