This is a remix of a thingiverse model:
https://www.thingiverse.com/thing:2583231
This is designed to hold two plant cuttings safely above the water in a small-mouth mason jar. The holes are 5mm, so make sure that the cut stems are smaller than that or ask and I can redesign them larger. I've also included the .stp file to make that easier for anyone else.
Print 2 of these, they only cover half each.
The author hasn't provided the model origin yet.