Even better? It's a huge money saver, too — especially if you have long or textured hair and tend to blow through bottles of shampoo. To try it yourself, you'll want to get a small bottle with a pointed applicator tip — we like this $3 option from Sally Beauty. Pour a few drops of shampoo into the bottle, add a few teaspoons of water, and give it a little swirl. (Do NOT shake it, which will create a lather bomb you can't get out of the bottle.) The right mixture really depends on your hair type and needs, but starting with a 50/50 water-to-shampoo ratio is a good place to start, then add or subtract water as needed.