Wine crates can be used in many DIY projects. They are usually made of solid wood but are really inexpensive. Probably you even have several of them lying around but if not you can always buy them in local wine shops. Here is a bathroom storage cabinet made of two wine crates. The bigger one...
This ugly step cabinet was updated in a few hours of work, and less than $5 by a creative woman behind Metal And Mud blog. Two smaller drawers were covered with scrapbook paper while the larger one was painted with several coats of glossy white paint.