I bought the regular foaming hand wash pump bottle for $5.99 and it lasted quite a while. But I have three bathrooms and the kitchen needing hand soap, so I bought a bottle for each.
I also bought the gel hand wash refill bag (maybe $6.99 or $7.99? I can't remember...) since I couldn't find a refill for the foaming hand wash. I found out that a 1:1 ratio was way too thick for the foaming pump. So was a 2:1 ratio (water to soap refill).
Now I just pour in a tiny amount (maybe 6:1 ratio) of the gel hand wash refill and add water to the top. A gentle shake and I have a new bottle of foaming hand wash!
I am still on my first bag of the gel refill and it is at least half full. I regularly refill 3-4 pumps and I expect I have saved at least $50 so far. Texture and smell of the foaming soap is the same as the original pump. Plus, I am being green by buying the bag refill instead of all those bottles.
An important note about refills: the refill must be gel, not a cream soap. I tried this using a creamy B&BW hand wash and the results were nasty! I actually had to throw out the bottle (well, recycle it) because the soap and water separated and got the pump all clogged up.
Also, it helps if the pumps are all the same scent as the refill. Then no one will guess it is a thrifty soap DIY!
Add more or less gel soap as you wish!
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