Using PVB and this model you could create a small greenhouse for your rectangular flower boxes.
Print a front and back cover and as much body parts as you need. Cutting the body to size can be done in the (prusa)slicer. When scaling the parts, only scale X and Y, and keep the Z, at least for the front and back.
Using isopropanol, get the transparency you want to increase the temperature in the greenhouse. Also this could be used to fuse the parts together. And if it is a snug fit, isopropanol should make it flexibel enough to be pressed together.
I designed it to be as thick as 2 perimeters in 0.20mm profile for my prusa mini+. It should be printable without support.
Print the front and back laying on the flat sides. And the body with the thick side down.
This is a work in progress.
I had the idea too late to have a fully developed prototype for the contest, but i tried anyway and will add pictures of the progress. Sadly PVB does take a long time to fully get transparent and therefore being the final product to show here.
It should currently be used indoor, as there are no earthhooks yet.
The Pictures show the greenhouse without isopropanol and with one round of treatment over basil.
The author marked this model as their own original creation.