Uh... who cares really about the speed of cooling and wateryness of drink, all that... it's a perfect sphere... it's just cool because it's a sphere. If it takes longer to cool my drink... I don't care, cause it's a sphere. Maybe I'm looking in the wrong place but I see nowhere that they claim to be able to cool a drink faster... but either way, it doesn't matter.... cause it's a sphere. The amount of time and effort I could waste on worrying about what kind of ice cube cools my drink faster could be much better spent on actually drinking the drink... especially if it's got a cool sphere ice cube in it, :)