Make your own foam soap

MAKE YOUR OWN FOAM SOAP This is probably one of my favorite and best money savers. Save your old FOAM soap dispensers, it has to be the foam dispenser or it won't work. Fill bottle to where my finger is pointing with any kind of liquid handsoap, so about 3/4 of an inch of liquid soap then fill the rest of the bottle with water leave about an inch of room at the top, put the pump back on and shake.......voila' foam soap. If you buy one of the big refill jugs of liquid soap it will last you years because you're only using a tiny bit so it's literally just pennies for every refill. Any similar money saving ideas to share?