We have these 3D printed parts below. Two big gears and a cylinder in between, the spool for the bottle plastic strip. All these parts were printed with PLA filament, 0.2mm layer height, 2 perimeters, 20% infill and 0.4mm nozzle. To increase torque, I’ve made another small gear and this gear will be rotating with another smaller gear connected to a stepper motor. I’ve made two support sides to keep the gears in place.