Just a colored pencil holder I designed for a set of colored mechanical pencils I found on Amazon. See: https://www.amazon.com/dp/B01N5H8TD5/.

Printed in translucent PETG with 10% Gyroid infill. The colored pencils can be seen through the shell for a cool effect.

I added some small, adhesive-backed rubber pads on the lid (shown in picture 4) so that the pencil case will not slide when inserting/removing pencils. I highly recommend doing this, as it made a surprisingly big difference in the usability of the holder.

Prusa

I3 MK3S

Yes

Gyroid, 10%

Print main holder with no support. Print the top with support on build plate only.

Try the regular top piece first, but depending on your printer's tolerances, you may find the Tighter version of the top latches better.