This is a remix of the excellent bit trays by swholmstead .I didn't do anything except extend and taper the base to cut down on print time and filament use. They still stack exactly the same way as the original but because of the scaling issues when importing, they're slightly smaller than the original "large" trays. My problem with the original was that the bottom of the trays ended up being very rough feeling, like sandpaper (but that might just be my printer)

Print with top layer and bottom layer set to 0, wall thickness 1.2mm. Zigzag infill at 20%.

About a 25% savings in print time and a 20% savings in filament.

Update 2/24/23: I'm glad people like this but the ONLY change I made was to increase the base thickness so it can be printed with more structure when printed without top and bottom layers. If you don't want a mesh base, the excellent original is located here: https://www.thingiverse.com/thing:2564922