Well, not NEW storage, but rearranged storage.
I keep my polishes in some Ikea Benno CD towers. I started with one, and then expanded to two. Recently, my stash has grown (I've got about 400 bottles now) and I was starting to struggle to find things.
This were my shelves this morning. I tidied up a big shelf on one of my other sets of shelves (I have two other big sets of Billy shelves and one other Benno) to make space so that I could move these CDs over and free up the mini shelves here for polish.
I moved my multicoloured glitters across and split them from one compartment to two, and then moved my golds and silvers across.
This is now the top of my tall shelves. The very top is topcoats and bases, and a couple of Seche Vite kits. Then the blacks, which are still one compartment, the browns, which are now two, the oranges 3 (instead of 2)...
the reds are 4 (instead of 2), and the pink, purple and blue get an extra compartment each.
The poor yellows don't even get their own compartment! I only have 4, and one of them is a mini.
I'm pretty happy with this for now. I'd love to have my polishes on a wall somewhere, so that they're all lined up and all visible, but I don't have that kind of space! So for now, this is pretty and tidy.