This Double Head Bowl is quite a unique product. It functions just like a regular clay bowl except there are two heads on the same bowl. The air flow is the same and they are perfectly functional bowls. You can pre-load two bowls of the same shisha tobacco flavor and that way you don't have to worry about cleaning and reloading a second bowl. More importantly, you can mix two flavors of shisha tobacco in each bowl and get a nice "flavor mix"