This is the Cage Pendant. Its intent is to help repel flying insects such as mosquitoes. The top fits very tightly to the body. In order to use it as a repellent, soak a cotton ball in an essential oil that mosquitoes dislike, such as spearmint or castor oil, and place it in the cage, then snap the lid on. You can then run a string or chain through the loop on the top and wear it as a necklace or bracelet. You can also place several of these around an area to help ward off those pesky insects. I have included an STL file in the Download STL/CAD Files section. This has a free commercial license for those who want to sell their prints.