This is something I found online many months ago. I have been "making" my own handsoap, and stretching a dollar quite far.
You need a FOAMY handsoap pump and regular liquid handsoap. I bought a large refill bottle. I wish I would have recorded when I bought it so I would know how long it lasted us.
The easy instructions are to just add a small amount of soap into the dispenser (about 1/2 inch of soap or so), then fill the rest of the bottle with water. Shake until all the soap is dispersed. You now have foamy soap and you used very little of the liquid soap for one bottle.
We LOVE the foamy soap in our house. It is much easier for the little ones to wash off their hands. Since we are all washing our hands many times around here, this really does save our family money!
Let me know what you think! Have a great day!