After two small children, I have collected my fair share of glass baby food jars. If you want to consolidate your spice cabinet and make it look consistent, you can use the baby food jars to hold your spices rather than pay more money for a new spice containers. I use Goo Gone to remove the labels and wash them in the dishwasher to sterile them.
They can be used to organize your crafts too. I've collected them and used them to organize buttons, sequins and other small craft supplies.
This spring, I plan on using mine to hold small screws and nails in the garage. I am repurposing a wooden CD rack with cubbies and can place the jars in the rack, then hang on the wall above the tool chest.