Try any soap available in form of soap shavings in a mesh bag. Each bag contains at least 1 oz of soap.it is a great way to try variety of scents and the bag is reusable. It is particularly ideal when your bar soap becomes small. Be careful, this mesh bag combined with soap makes a lot of bubbles. Once done, just hang it up to dry and you will get plenty of out of it.
Available in variety of scents. 
My classic recipe.