Two-Toned Simple Vase-Mode Chopstick Rest

This is a simple design I put together for the chopstick holders contest.

It was designed to print quickly in vase mode but still have a splash of contrasting color to add interest to an otherwise very simple shape.

The taper of the chopstick rest allows it to be stackable by inserting the narrow end of one into the wider end of the next. Even without glue the inner layer is snug enough to stay put when unstacking, provided you don't press them together too hard.

Customization:

I included the OpenSCAD file that I used to generate the models. It's set up to use the customizer to adjust the size and some parameters of the shape, as well as allowing for more than one inner layer (though with the default height and taper a second insert will prevent stacking).

By default all layers will be shown: change the render value limit it to just rendering the selected shell.

Inner Shell Variations:

Since this consists of two parts that ideally will fit together perfectly I included multiple inner files with varying buffer: the number on the inner shell files is the amount of spacing between the inner and outer shell for that model.

Too snug and the inner layer will be bent in on the top, and too loose and it won't stay in place.

If your printer has multiple extruders you can combine Outer Shell.stl and Inner Shell - 0.00.stl directly in the same print with different colors per model.

Printing Instructions/Tips:

Print one Outer Shell and an Inner Shell of a different color, then slide them together until the ends are flush.

This has a small footprint and is printed in vase mode, so do whatever works best for you for increasing first layer adhesion. My first print of the outer shell (left in the pictures) came a little bit loose 2/3rds of the way through the print and you can see the slight layer shift that resulted in the left chopstick rest in my pictures.

My best fit of the inner shell ended up being Inner Shell - 0.05.stl. 0.10 was snug enough to stay put but didn't hug the inside of the outer shell as tightly as I wanted.

My prints use the 0.10mm DETAIL PrusaSlicer preset modified to use vase mode and only one layer of skirt. Each piece used just over a gram of filament and printed in about 20 minutes.