Tin can edge protection

It will allow you to use an old tin can as a pen holder without cutting your fingers on the tin can sharp edge.
There is a small edge inside the gutter, thus you will have to force a little to clips the protection to the can. Ones done it is almost impossible to remove the tin can protection.
2 versions:
- for 84 mm diameter tin can
- for 100 mm diameter tin can

Let me know if you need other diameters, I can create it for you.