hello i want to make a number of ice glasses and i need to make them clear and bubble free. i know that you can make clear ice if the water is circulating in the container as it freezes but due the number of glasses i need to make this method is not possible. i did think about doing a couple of experiments with partial vacuums and increased air pressure. what are your ideas? i have thought of making a vessel that would be air tight placing some water into it and pullling it down to half normal outside air pressure ie 7 psi as apposed to 14.7 psi. i would then place the conatiner into a freezer and leave over night to see if the air trapped in the water would be pushed out , leaving clear ice. i then thought about doing the same experiment with the same vessel but increasing the pressure to double or more of 14.7 psi and then placing the vessel into the freezer and letting it freeze. any isdeas on what i could expect????? cheers.... i also hearda bout placing propylene glucol to the watre and letting it freeze any ideas regards that.