You will need the following:
*Minwax Polycrylic Wax (I found mine at walmart $8-$9
*Clear Glass Ornaments (some people have had luck with plastic but I am not one of them)
*small paper cups (again I used what I had on hand but will tell you the paper cups would be nice)
Now you will get all your supplies out and together. Take the top off the bulbs carefully! Pour some of the wax into a cup and then pour a generous amount into the bulb. I rolled mine around in circles to make sure that it was all coated, then I placed it upside down to let it drain and dry for 15 minutes. THIS IS A VERY IMPORTANT STEP! If you do not let it dry your glitter will flake off.
I let mine set for a while to make sure the glitter set up. Then I put the top on. You can leave them this way or decorate them using vinyl. I am lucky enough to have a Cricut Explore so I decorated mine using images from the Close To My Heart Artfully Sent Cartridge. It did not come out like I had imagined in my head but I am still happy with it.