How can you make ice "sink"? Is there a way to attach water molecules in a fashion that in their frozen state, they would be denser than liquid and sink in water instead of float? Or is there some substance you could mix with it to create this effect, preferably an edible substance? I think it would be awesome to drink from a cup where the ice is at the bottom. I hate sipping or not being able to drink fast because the ice is in my way! I have even thought about making a wire mesh that traps the ice at the bottom of a cup.