A toilet design, remixed just for your Elf on the Shelf. One is designed to sit flat on the counter, the other can be placed on the edge of a bowl. Bowl feature a "chute" to make it clear how the "goodies" are dispensed (though the chute on the bowl version is smaller / touches the bowl slice.)

These toilet seats are about 1.5" across, and take 1:20 to print - you could scale a bit per your preferences.

For the plunger, on some printers can pause your print mid-way, switch filaments, and get a 2-color print.

Both should print ok without supports.

Oh, and if you need a little dialog inspiration:

I couldn’t help BUTT notice,
Gluten Free things on your shelf.
They’re ok, not bad, a little meh.
But take it from this elf –

I know how to spruce them up,
Just add a little … uh, goo.
Cause Santa’s chocolate’s number One
But mine is number Two!

Enjoy!