I have written several times before about this old trick of using a hollowed-out incandescent light bulb as a bud vase. Hollowing out the bulb is easy enough; the challenge is to make it stand upright. A rubber or brass O-ring works but can get lost. Specialized self-supporting bulb shapes are easiest but largely defeat the purpose of creative reuse (what if the one you have to recycle isn’t one of the unusual self-supporting types?). Rearview mirror cement offers some interesting options but the vases I made this way did eventually fail, perhaps due to thermal stress on the metal/glass unions.
Here’s another method that occurred to me recently, which I rather like. It just takes some copper wire and a soldering iron. The coil is soldered to the bulb’s screw base at one end and to itself, in one place, to make the bottom ring. I used 22 gauge bare copper wire here, which is what I had on hand, but a slightly heavier gauge would probably work better.
It’s easy to do, cheap, looks good, requires no especially unusual materials, and results in a one-piece construction with nothing to get separated and lost.