Full_Empty_Cylinder_Tags
These tags are designed to be used on cylinders to mark full and empty. I printed the "empty" in red and the "full" in green. Then with a little bit of acetone they were joined back to back. I tied a piece of paracord through the holes and put it over the valve.
When the tanks come in they are all marked full and when we switch out an empty they get flipped to the red empty side. Works for welding cylinders, home oxygen, bbq propane tanks, ect.
This thing was made with Tinkercad. Edit it online https://tinkercad.com/things/gHHtSRLCB32