They are called "Stackable Desktop Drawers" and are made of polystyrene. Basically plastic. It's originally for sorting paper. Each unit has three white pull out drawers. The drawers pull out nicely and I love how they are shallow and wide. I didn't want to waste vertical space or have to stack my makeup on top of each other. Each drawer is only 1.25" high.
http://www.containerstore.com/shop?productId=10024247&N=&Ntt=Paper+drawers
To hold my makeup I need two sets of these so I have six drawers. I actually prefer this to the muji. It is a cleaner look when closed. (and costs less) I also have the muji that I use for jewelry storage. Muji is great and I love acrylic; it just tends to look cluttered.
Perhaps later I will have more pics of what's in my other drawers!
