For this 3D print, I printed something similar to a colander for straining things.
This is what it looks like, it was a very easy print.
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It could be used to sift anything. I used it to sort sand from rocks and it worked well. It was a very easy print, I just used normal setting and it printed great. Here is a link to the print code: https://www.thingiverse.com/thing:909118
The print code is for various sand toys but obviously I only picked the strainer.
Here is a video describing the print in more detail: