Just simple bulb for Christmas tree.
Glitter red, transparent, blue, gold
Bulb printed in vase mode with 0,4mm nozzle at 0,15mm layer height. Just set bottom to 1mm thickness. For tip of the bulb is needed extra cooling, so if your printer does not provide enough of it, use external fan.
Bulb top is also printed with 0,4mm nozzle at 0,15mm layer height. Print 6-8 of them at the time for better printing results.
Since parts have tight fit, use some sandpaper to make perfect fit. Join them together and apply drop of CA or other glue for plastic materials. Use wire hooks or thin string for attaching bulb to tree.