So simple it is stupid

[2muchtime]

There are drinks on the market with a "pull up nipple" so you can drink .You push it down and it will not spill. I took a top off one of these bottles.It fit the oil container. Now I can put fluids in my vehicle
without spilling them everywhere. This is also gr8 for show cars.Most ppl pour the oil in and then have to get rags to wipe off the spilled excess.