I have been getting into essential oils and recently bought 10+ bottles (oops). I have a 4 year old and those little bottles are expensive so saw some shelves on Pinterest but they are basically spice racks. It really important to keep them out of then sun so I came up with something that works for me. A very free box to easily find them all (until I buy more). Any box would really do, but short and wide is good. To organize the bottles so they don't bang around I cut squares from another small box I had.
Squares to separate bottles they happen to fit 2 1oz bottles perfect, you could use small containers or whatever you have around