I created these whale buttons (from the sketch in the whale.svg file) for use in some knitted slippers. They are not very practical buttons (hard to undo), but they do have whales on them.
I print these in 3 colors on a non AMS printer by putting a pause in the slicer before layers 16 and 22.
I've included the Freecad files in case you want to modify/scale the model without scaling the holes or something. Look at the spreadsheet for parametric dimensions that can be easily modified.
For a cookie-cutter version of our whale friend see:
https://www.printables.com/model/1172126-whale-cookie-cutter
The author marked this model as their own original creation.