![f0184-01.jpg](https://article-imgs.scribdassets.com/55fs768ukgazs5eo/images/file3INWAFKL.jpg)
Cassette toilets are pretty simple devices. The bowl receives the waste, and it is then stored in a little holding tank underneath. In between the bowl and the tank is a sliding disc known as a ‘blade’ thatpoint. The blade has a rubber lip seal which creates this odour and leakproof barrier.