Review of 65mm Funnel:

I bought some small stainless funnels in the past that turned out to be AWFUL.  This funnel from Bull City works great.  The funnel fits well in the bottles and has a large capacity to get the job done. You will find that there is no air exchange while filling so you must squeeze the air out of the bottle and allow the fluids to be sucked back in.  If someone has a better way I'd be glad to hear it.