I purchased some Milwaukee Packout gear, but have found the versatility lacking, and as such have been looking for some small solutions to take the design to the next level. One such thing is quad dividers for the rectangular slim cup.
It fits snuggly in an empty cup, a bit more so than the factory single unit. It could perhaps use an extra half a mm on the outside edge nearest the top outside edge of the cup, but given the various small tapers, it is hard to be exact. And, should not be an issue unless trying to store tiny washers.
T divider version added here: https://www.thingiverse.com/thing:3523486
PS: Printing wise I have a couple adhesion issues of late with my printer. They seemed to have been sorted out somewhat, but when I printed with a skirt, again, the initial layer of the x had some trouble, for whatever odd reason, ... printing with a brim is working out better for me.
PS PS: With my settings this is taking about one an a half hours to print
I'm still a 3D novice. Designed by myself in TinkerCad. Printed in Cura 3.x final to a Creality Ender 3 on basic Zoro Red filament. Settings were 0.2mm high, 0.4mm wide, 2mm wall top and bottom thickness, with 999 layers for a solid print. Print speed 60 with outer wall speed of 30.