2:1 is quite common, because it's simple, despite being not great, especially as amount cooked increases. Rice isn't speherical, but it isn't a perfectly packe

2:1 is quite common, because it's simple, despite being not great, especially as amount cooked increases. Rice isn't speherical, but it isn't a perfectly packed crystal either. Unless you think air fills up inside each grain, the volume from "air" is the packing volume.