This is a stand to keep your 3D pen from burning stuff when you put it down. It also makes a nice little display if you want to show it off... it'll gently hug the pen with enough grip to keep it there.

No supports needed if you print it face-down.

I designed it to fit the "AIO Robotics Premium 3D Printing Pen" but the same pen seems to have a bunch of vendors / names. It's from a company called MKOEM.

Other pens (and other stuff) should fit too; the top of the slot is 17mm wide, tapering down to 14 at the bottom.

Enjoy!