Quick solution is Aleene's Tacky Glue. Water washup, and it won't mar the finish. Elmers glue does the same, it has a weaker bond, though. Super glues work, but the fumes will create a white film on the glass that ruins it, unless you dip the parts in Future floor wax. Plastic cements also work, but you're at a real risk of marring the part with excess glue. I do a variety, but option one is my go to.