As I am a major fan of OPI nail polishes I wanted to display them proudly on my new vanity, also I ran out of space in my nail polish box. So I searched on Ebay to find the perfect storage "thingy", for lack of a better word.
I found a 36 slot official OPI nail polish rack for only $20! Of course you can make one yourself, or buy one of those step spice racks from bed bath and beyond. I really love this new set up, and how available my OPI's are to me now instead of having to dig through my now 20 pound (feels like) nail polish box.
I bought it from this seller off of ebay: http://www.ebay.com/itm/160632168584?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649#ht_500wt_1287
The rack cost me $9 with $11 shipping. It didn't come put together but it's pretty easy to do so.
In any case there are many different ones off of Ebay, just look around.