You've probably fallen victim to funnel overdrive, where you pour more than you've liked into a funnel. It is not a deal-breaker, but it's nice to know someone out there cares.
Zevro manufacturers what they call the Smart Funnel. Unlike regular funnels, the Smart Funnel has a handle for easy positioning and carrying along with a pour control system that allows you to control the flow of liquid or solid that will go into your container. When you have poured enough, you turn a lever and the funnel closes. Presto! Another much-appreciated feature is measurement marks along the funnel to indicate how much exactly you are funneling through.
Found at Amazon