Read me!
If you'd rather not nail them down, Printables user Stremreich has made a great remix that stands better on its own. Check it out at https://www.printables.com/model/1119525-christmas-bubble-light-standalone-base.

I designed these things a bit ago for Christmas, but of course, my printer broke down before I could test them. Should fit most bubble lights. 

The model is meant to be fixed in place with screws or thumbtacks.  

This should work with your regular print settings in PLA, but what I used was:

• 0.2mm layer height,
• 40% infill

Be sure to post a make if you printed some yourself!