Lol! "Fighting Gravity" Lol!!!
All you have gentleman, is a bottle rocket.
It's bottled at one atmospheric pressure to start with. As soon as you turn the cap enough to release that pressure, you are going to end up spinning at some godawful velocity, and probably a complex series of vectors as well, because it will immediately spray out through the path of least resistance before you get the cap fully off.
Assuming you could direct and meter the flow, you could use it for propulsion.
All this assumes that you can keep it warm enough to stay liquid. The bubbles will just end being CO2 trapped in a frozen H20/C8H10O4 solution. It's -273C in the shade out there folks.
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