I’ve always admired the simple but effective design of the pour spout on salt containers. This project is a neat way to reuse it: chop off the top, resize it to the diameter of a Mason jar, and voila! You have a pour spout for your jar. Jennifer of The Craft Patch made this for her yeast, since she buys it in bulk, but she also suggests using it for spices, baking ingredients, and bulk laundry detergent.
Mason Jar Pour Spout