Milk Frother

I found the best luck in printing this as the model is, only downside is the case finish is not so great IMO (this can be countered by increasing print resolution quality but will take longer to print). I printed this in PLA, 100% infill and 0.16 layer heights. You could probably get away with printing it with 15% infill and still be strong enough.

Supports: Yes

Items Used:

DC motor: 380S-33154 DC 3.6V Motor (15,000 RPM) (Case specifically designed for this particular motor with vent holes and securing protrusion)
Battery: 1x 18650 or 21700 Lithium Ion (21700 battery is kind of a tight fit but will still fit)
2mm Stainless Steel Rod (For making of frother shaft that connects to motor)
TC4056A Lithium Battery Charger and Protection Module
24mm Arcade Push Button Microswitch
Piece of Pen Tube Plastic
2x M2 Screw
2x M2 Nut
1mm Stainless Wire (For making the actual frothing end)

Optional:

4x 5x2mm N52 Round Magnet
1x 693ZZ Ball Bearing