This is my pcom final prototype2.0, made by 3D printing.
The full view: a huge cup can hold a plastic cup.
Top: the four tube is for hold sent oil.
Top cover: the four hole on the top is for mount buttons, the four small hole on the side is for smell to coming out.
Bottom: mount fan, because the squares are very precise for fan, i can simply plug the fan on it, and use very little hot glue, it’s very stable. the hole is connect from fan to tube and top of the cup.