If your kids are like mine they use a TON of liquid soap when they wash their hands. This is one thing I don't get on them to much about though because I would rather them use to much than too little in this case. I have recently implemented a simple and effective way to cut the cost of the liquid hand soap. I dilute it with water by about 20%. If is still very effective as a cleanser and it comes out lighter and foamier like the direct foam products. It may not save you a ton but it may keep you from shuddering every time a little one goes to use the sink.
This post is linked to moneysavingmom.com