Just a quick and dirty funnel design to recycle used IPA within normal bottles. I use an old water bottle but the thread will most likely fit any bottle with a similar size neck. The idea is that once you have done a rough filtering of your used IPA and have let it cure for some time in the sun you can then filter it through again into a new bottle using this funnel and with the help of a regular coffee filter.

The funnel consists of two parts. The main funnel with a thread that you can screw on a water bottle and a spacer for inside the funnel so as to not limit the throughput of the coffee filter only to the opening which will clog up after a while.

Also included a version of the funnel which has no screw on part.

Print it upside down on the plate and you will need no supports.