I have designed a simple and stable filament holder here, which can be printed in one go. The holder consists of a total of 4 parts and 2 ball bearings 608Z. The axle is made up of 2 parts and is held together by the two ball bearings. Gluing is not necessary, but it can be done.

I had found various holders on this site, but none could meet my requirements. Especially the holders that can be mounted on the printer were insufficient for me, as the holders mostly bent and the roll hung askew on the holder. Therefore, I simply constructed a simple, yet sturdy holder.