Chemical Marketplace: Bar Soap vs. Liquid Soap | HuffPost
Dec 04, 2013·During a recent price check at my local grocery store, I found that a typical 177-milliliter plastic (!!) bottle of liquid soap went for $2.69, while a 12-ounce three-bar pack of solid soap was $3.99. Those numbers translate into about 1.2 cents per gram of bar soap and 1.5 cents per gram of liquid soap.