Each one has been made from a tillandsia air plant that has been housed inside a sea urchin’s shell. They have a loop of clear line attached in the base, which means you can easily hang them upside down, creating the illusion that these jellyfish-like concoctions are magically floating in mid-air.
 
To care for tillandsia, place in a spot with bright indirect light and allow plant to soak in water for 20-30 minutes each week to prevent it from drying out