See if you like any of these?
Hi Diana! A chalk based paint works great for painting jars. :) Annie Sloan or Jolie work great for this type of project! You can check out my how to paint glass mason jars below. :)
This is a good tutorial: https://www.google.com/search?q=painting+mason+jars&ie=UTF-8&oe=UTF-8&hl=en-us&client=safari#kpvalbx=1
I'd use spray paint!
I use spray paint. I painted this black one and use it for propagating plant cuttings in water all the time!