Homemade Foaming Soap

You only have to buy foaming soap once! What makes the soap foam is the bottle, not the soap itself. Save your bottle and refill it with your choice of soap. What I do is dilute unwanted shampoo or soap/body wash. I start with 1/3 of the soap, then add water. If I want a thicker soap, I can then add more, but it's usually not necessary.