This is a realistic model of a classic light bulb. I designed it to serve as a pull switch. Although it is not designed to reflect the exact Edison thread for E27, it still does fit an actual lamp fitting. Added feature: it is hollow, so you can also store something inside. Both parts simply screw together (with a metric M20x2.5 if you really wanna know ;)) Fusion360 file included with a minimum of names - this was a quick design and print (6h or so including research and printtime)

20/dec: oops: somebody beat me to it... - from the looks of it -containerwise- this one looks better! https://www.thingiverse.com/thing:2280081/files