When I 1st refilled my windscreen cleaning detergent the funnel I had at home made me quite angry. It was too narrow and so I needed one hand to hold it and at the same time had to hold the 5 liter canister.

Hence I designed this beautiful funnel which can be put snug on top of the car's cleaning detergent nozzle. It has been designed with a small channel to allow air exchange - so no “gurgeling” effects :-)

PS: My car is a Mercedes A class (type W176), the front nozzle of this funnel has an outside diameter of 46.7mm