I needed this idea the other day, but I can't remember what for. :P How to Build an Easy Glass Bottle Cutter made up of Common Parts DIY Project - The Homestead Survival - Homesteading Re Purposing Tool
A good idea for a small bathroom, under hanging shelves for things like cotton balls, cotton swabs, etc. Also great in the kitchen, for a spice rack over the stove. Just hang jars from bottom of the cabinet.