3D printing is a great tool for upcycling. This is a self-watering planter that uses a leftover jar for its body. The great thing about it is that you will always know what level the water is at. Also, this way we use way less plastic for printing and don't have to worry about it being watertight. Win-win.
The model is based on a jar with a 67mm top hole diameter - that is a standard in eastern Europe. The standard in your part of the world might be different, so be sure to edit the model to suit your needs better.
I used both Ender 3 and Prusa MKR3s for printing mine. The model is simple enough to be produced without any supports.
Personally, I use these planters to grow basil and salad, but I'm sure you'll find some other uses for it too.
Happy printing and happy growing!
You can follow me for similar projects at @panama_workshop on Instagram
Inspired by the Campbell Planter by @flowalistik