The secret sauce to this jar is the insert. Add Parian Spirit cleanser and the mesh insert acts as a scrubber for your brushes. It really works the product between the bristles to remove all traces of makeup, dirt and oil. If I broke this jar, I would buy a replacement immediately.
I love the ingenius little cleaning grid at the bottom of the jar. It makes getting between the bristles of the brush so much more effective. I bought this at MUS a few years ago and was so happy with it. It's amazing how the solution and the jar get rid of even the brightest red lipstick from a lip brush in seconds. Just wish the glass wasn't quite so heavy, but that's not enough to be a real issue. Still rate it five stars!
Dedicated cleaning jar
Put a little bit of Parian Spirit in the jar and rub your brush hairs into the little plastic grid. Besides getting the essence of orange in the air, you:
1) reduce the potential mess from liquid cleansers, and
2) have the individual brush hairs open up to get the hard to reach spots cleaned.
Minus 1/2 a star for not fitting my bigger powder/foundation brushes in jar. I did use the lid as recommended in the product description. It just seemed funny to me my big brushes can't join in the cleaning fun.
I set this jar close to my brushes on my vanity. Now I'm reminded to clean my brushes every time I see it.