Spacer for double-cup plant starting method

thingiverse

Sometimes the double-cup setup runs out of space for roots between the cups before I'm ready to transplant. You can add these spacers to reduce root crowding. The largest one has a spout for refilling. If more height is needed, spacers can be stacked. Fits ordinary full size solo cups, both the round and square bottom variety. Use scaling in your slicer if you want it to fit a larger or smaller diameter cup.