When I do my grocery shopping at Safeway, I often see the the LaCroix brand of carbonated soda.  I have never tried the brand before but I really like the colorful packaging and the different flavors which makes me want to try the beverage really soon.  But I did not know that you could use this carbonated soda for making soap.  I found this recipe from The Soap Queen called Grapefruit LaCroix Soap. This is an advanced cold process project that takes 1-2 hours to make and yields about 3.5 pounds of soap.