The Mason Jar lights gave me inspiration to make another project. This took no time at all. I used an old handsoap pump that I was not using:
I punched a hole in the lid, slid the pump on it and used a hose washer to keep it steady:
Put it together with the jar, added soap from dollar store bottles and presto!
It really does not look as blue as in the last picture. Here it is a bit farther away. I love the added functional decoration!