I like to store mine in Quart / Gallon sized Ziploc bags. They are sanitary IMO. I wash them regularly with shampoo, air dry them and zip em up in bags. One bag with eye makeup brushes and another with face brushes. One more with brushes I don't use very often.
Something about storing them in open pots scares me. Especially when I see the amount of dust a house can accumulate. So, storing them in bags is my way of taking control of the situation.
How do you store your brushes ?