Soap noodles are essentially the basic building blocks of soap bars. They are solidified forms of soap in small pellets or noodle-like shapes, produced as an intermediate product in soap manufacturing. Soap noodles are made through the saponification process, where vegetable oils (like palm oil, coconut oil) or animal fats are reacted with an alkali solution (like sodium hydroxide). The resulting soap base is then refined, dried, and extruded into the noodle form.