Modern plastic 1 quart oil bottles have the funnel built in. In the old days of one quart cans of oil, you either used a spout or opened the can with a can opener and poured into a funnel.
You will note that on a modern oil container the spout is offset to one side. The design is meant to place close to the oil opening of the engine and once started you simply tilt it up vertical inserting the spout into the opening.
While the use of a funnel may be necessary on some engines because of an awkward oil cap placement, generally speaking using a funnel to add oil is reinventing the wheel, and will cause more mess and problems then it solves.