I needed a better way to discard used utility razor knives. i was previously wrapping in electrical tape, but that was never a guarrentee for safety. This was a simple solution and portable / stowable option for those interested. The top is designed not to need supports and mines seemed to print out just fine. Once the razors go in, they don't like to come out. 

Could probably do a multi-color for the lettering, but my sharpie worked just as well.

I did 3 perimeters and 4 shell top/bottom. This was printed in Bambu's yellow pla.