I find that refills for the Kandoo and other foaming soap pump products are costly. With the combo of sales and coupons, you can purchase the initial pump at a reasonable cost, but the price of the refills will kill you. I refill them myself. I twist the top off of the foamer bottle and pour about 1" of regular concentrated strength liquid dish soap into the bottom of the container. I then slowly refill with warm water to the fill line. Recap and swirl around gently, so as not to foam it to death. I have also found that turning the bottle upside down and swirling gently helps to keep from clogging the feeder tube with full strength soap. It doesn't like full strength soap! Turn the bottle rightside up and it's ready! Voila!