This is a remix of "Sea Urchin Scan, NextEngine Scanner" by dricketts. I hollowed out the interior and added top and bottom holes to make a habitat for air plants. It's also been resized for this particular variety of air plant (see picture) but you can scale the file up/down to accommodate yours.
Video of how to hang the air plant and sea urchin: https://youtu.be/0NYdSkUQsK4
These are the air plants we used: https://www.amazon.com/gp/product/B00DIGVDV8/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
sea_urchin_2.stl | 5.6MB |