Here are the ones that I liked best — not mentioning the bath bombs and regular soap bars with which most people are familiar. (treehugger.com)
My main reason for using soap bars instead of liquid shaving creams is also that I can easily carry them as hand luggage when traveling. (gentlemansgazette.com)
This type of handmade soap bar is called a cameo bar, and is of the «looks good + smells great» - variety. (finecraftguild.com)