Baerman funnel and holder

A Baerman funnel is used to easily “catch" microscopic animals for viewing them under a microscope. To do this, put a little bit of moss upside down on the grid and put it under water. If you want to prevent larger pieces of sand an dirt to sink, you can put a finer mesh between the funnel mesh and your moss. Microscopic animals living in the moss will sometimes let go and fall down into the funnel. Together with the funnel I designed a holder to keep the funnel upright, maintain water level and catch animals in a secondary funnel at the bottom. You can easily use a pipette the catch whatever's down there and put it on your slide. 

Because of the slit down in the holder the whole bottom will fill with water so it becomes a steady base. Cutouts at the top will help to take the the funnel out easily. 

The funnel is designed to be printed upside down so no support is needed. The holder can be printed right side up without support as well. 

I printed my model with a 0.4mm nozzle and 2mm layer height, but layer height can be changed to preference. When printed at it's intended size with a 0.4mm nozzle, the holder will be three layers thick preventing any leaking from a Z seam. Printing smaller, and thinner, might result in leaks. 

This funnel is inspired by this video from the excellent Youtube channel: Journey to the Microcosmos (more info around the 2 minute mark):