I made a DIY poop bag holder for pets to use when traveling by car. It's designed to attach with strong magnets. By the way, I put one medium-sized dog's worth of poop in it and drove about 10 kilometers from a gravel road by the river (about 500 meters) to my house in the condition shown in the photo, and it didn't fall off or shift. For reference... It can be used in various ways as a small item holder in the car or indoors. The color is gray. Thank you.