These tree decorations are printed in “spiralized mode.” Printing in spiralized mode is fast, uses less material, and gives you the best optical quality for your translucent filaments.
The bottom fits a standard electric LED tealight.
See here for video: https://youtu.be/cXp54iDL20g
See here for stable downloads:
With ornaments: https://social.thangs.com/m/528318
Without ornaments: https://social.thangs.com/m/528337