I prefer to use the Weck 3/4 Liter Tall Jars to store my starter and wanted to make a simple adapter lid. The dimensions of the top are the same as the Breadwinner lid and the unit is clickable. I did make it a loose fit on the jar to allow for some flour build up and prevent it from being airtight.

This model does require some supports around the brim, I am sure the model could be modified to avoid this.

I printed in White PLA with 50% Gyroid infill, top surface ironing, and an extra top layer.