Everyday 3D printing uses

What kind of things have you printed for everyday use? For me, I find my printer handy for making (last-minute!) custom gifts for my friends and family. I'll often print something as a extra item to include with another gift. For example, I printed my sister a large 48 pencil-crayon holder for her desk, and for my brother I printed a lithopane of a Magic Card he liked. It's pretty cool when you ho..