Dollar for dollar, this is one of the best investments in auto servicing I have ever made. The top of the funnel is large enough to accept the pouring of about anything you might want to pour into your auto's liquid reservoirs without wasteful spilling and the bottom is just the right size to make sure it gets into the receiver end of the receptacle without undue run-over or fumbling. The funnel has earned a permanent home in my auto's trunk space for really needed and handy tools.