Big funnel

I made this funnel for a poultry waterer that has a small opening for pouring water from a bucket. The funnel has ribs to let air escape from the waterer, and it also has a fold at the top to prevent sudden overflow from the funnel. It also has a loop for hanging it on a nail. Diameter of openning in waterer is 50mm. Diameter of funnel openning is 160mm. You can use it for pouring diesel or gasoline, etc.