Dog poop bag FIFO holder (could attach to leash)

I take some plastic food bag with me to pick dog poop. I put these bags in my pocket, but they made my pocket messy. I bought a plastic capsule to store these bags. It has a screw on cap which can attach to the leash so its easy to carry it when I walk the dog. But one day when I go back home with my dog, I found only the cap left on the leash, the capsule body is gone!

I want something that can store my plastic bags without caps or any moving part, so they won't get lost. So I designed this FIFO dog poop bag tube. It can hold ~ 10 20cmx30cm food bag. It's a tube open on both ends with round teeth in it to keep the plastic bags in place. The teeth is placed in a way that it is easy to push the bag from one end and take out from the other end. There is no cap or any moving parts, so nothing could get lost. Its fully open but the bags can be pretty secure. It comes with a 5mm hole on the wall so you can attach it to the leash easily.

I use 30cm by 20cm bags and they fit pretty well. Crumple the bag into a small ball and tuck it in and it will be there.

Printed with PLA basic without support.