As an application developer this story makes me wish I had taken a few industrial design courses back in college.
Effective design! I need to go see if they make anything like this still with a real nozzle. The plastic 'no drip' nozzles you find in the bulk hardware stores are completely worthless.
There is a spout which attaches to the same holes as the cap and latches on very securely. You don't need a funnel.