And they're free.
The bottle openings are just the right size to secure the funnels and keep them from flopping around while you pour your fluids.
The oil funnel is a 2 liter soda bottle and the radiator funnel is a 20 oz. soda bottle cut on a 45 degree angle.

 

HEY!!!!! Did you take my funnels out of the truck of my car???? LOL I have a set of those!!

 

OMG, I have not done that in years, but everything you said, 100% true!! Readily available, cheap and I typical throw it out when I'm done using it (no clean up).

Well, actually, I'll admit, I never thought of the 45 degree angle trick for the radiator, but I will remember that in the future. Thanks for sharing!

 

I do this too. But I do like the 45 degree angle trick. I will need to do that.

 

The more I think about it, the more I'm convinced the 20 oz. bottle cut at an angle is the only one needed. It should pull double duty just fine.

 

I for one can appreciate a good funnel, seems like that is always my quest, a simple stinking damn funnel. And here you have the perfect solution, thanks much for a simple but actually useful funnel. I have about 6 different and none are really my favorite.

 

ZIPPY02, I think you're about to find your favorite funnel.

with the exception of my transmission funnel, all of my others are top heavy and try to fall over. the Plastic bottles are bottom heavy and tend to stand upright, naturally. Try the 20 Oz. bottle first. I think it will be all you need.

 

Sweet bro, I'm on it, it just seems so perfect. Your right, most funnels are either to short with a big mouth, thus top heavy, or long enough with a small mouth (like a tranny one, but not that long) just a joke. I still think the 2 liter one is good for engine oil pouring from the 5 quart jugs. But anyway looks like I'm collecting a few plastic bottles. Thanks again...

 

great idea! I will use these for sure! how about a good power steering funnel??

 

I think either of the two would work fine for the steering fluid.