About three years ago we went to an outlet mall and I picked up three bottles of foaming hand soap from Bath & Body Works. They were in the clearance section, and if I remember correctly, I only paid around $5 for all three.
I love having foaming hand soap for our children. It is less messy and it doesn't get all over. Even if they put too much in their hands, it still doesn't make a slimy hard to clean up mess.
I don't, however, like the price. I know $5 is a good deal for three Bath & Body Works soap. And I will splurge on occasion and get a bottle or two, but I can't justify having it for every day use.
I decided to reuse those foaming hand soap bottles and make my own. I went to Sam's Club and picked up a pack of two 80oz bottles of liquid hand soap. This pack sells for around $6.50.
To make the foaming soap, I first put in warm water, about 2/3 to 3/4 full. I will then fill the rest of the bottle with liquid hand soap, leaving enough room to put the pump back in without overflowing. I put in the water first so the soap doesn't suds up and go all over the place.
I figure I use about 1oz (or 2 Tbsp) for each bottle. I can get around 160 refills with the two bottle pack I bought from Sam's Club. That comes to about .04 cents per bottle of foaming soap. I bought the liquid soap approximately 2 years ago and I am only part way into the second bottle. We have three soaps that we will on a regular basis. That is a great savings!