How to Make an Ice Cube

David is tired of sullying his beverages with inferior ice. When he fixes himself a drink at home, he wants it to look like the cocktails you see in high-end liquor ads: a tumbler filled with ice that glitters like diamonds (only cubed). Join David as he gathers expert advice from icemakers, ice sculptors, ice harvesters, glaciologists and venerable Buddhist monks -- you'll never freeze water the same way again.