I purchased this resistor kit a couple years ago and got fed up with the horrible plastic bags they come in and designed a replacement for the bags.
This design is specifically designed to fit in the box that comes with the above product, but will work with any ½W or ¼W resistors.
I'd recommend printing with a brim, as it really likes to warp. I printed mine in PLA @ 0.2/0.16/0.1mm layer height with no supports.
The author marked this model as their own original creation.