I just recently received my Sigma complete brush set in the mail (So excited!) and I needed a way to store them so they are easily accessible. I had seen this way of organizing them from many girls on Youtube and it works amazing and is inexpensive!
I bought the two glass bowls from the dollar store (for obviously a dollar lol). You can get these from anywhere but they will be a little more expensive. I got two instead of one big glass bowl in order to seperate my face brushes from my eye brushes. In the bowls, I put sand that I picked up for $2.99 from Michael's arts and crafts store. I was going to put black colored sand in them for a cooler look but I didn't want the black color to rub off on the handles of the brushes.
If you want you can also decorate the glass bowls with stick on rhinestones or studs. :)