I used DAWN for these bottles, but have used Ivory liquid dish soap as well. It makes my hands soft and both are antibacterial.
Slowly add enough warm water to fill the bottle, leaving a small space at the top. Replace pump and gently rock back and forth to combine water/soap. Don’t shake. Let sit for a minute, give it a couple of pumps and that is it!A large $3 bottle of your favorite scented antibacterial clear soap will make 10-15 bottles of foaming hand soap.