Event showcases the toilets that could save lives
22 March 2014 Last updated at 13:59 GMT
For lots of people around the world, a toilet is a luxury they don't have.
It's thought that 2.5 billion people on Earth haven't got a working loo, and it means really serious diseases spread easily in poorer countries.
Now a big event is taking place in India aiming to invent the toilet of the future, which could change the lives of billions...
Check out Ayshah's report