1. It uses ordinary materials - cement, sand and water.
2. It is easy to make - A mason will be able to make one immediately and a person without plastering experience can learn the technique in a short amount of time.
3. It uses simple tools and equipment.
4. The mould is made from ordinary materials - grain sacks and a small amount of wood.
5. Leaks resulting from poor workmanship or damage can be easily repaired.
6. It needs little or no maintenance.
7. With care, a container can last more than 15 years.
8. It protects the contents from rats and animals.