Elmo,To say at what P.S.I a plastic soda bottle will rupture is not possible due to the numerous manufactures that produce soda bottles at a non-standard thickness or grade of material. WHOLY SH^T Elmo! 150 PSI??!! DUDE BE CAREFUL! you can loose a finger with that much PSI. Check out this expierment. m
https://www.youtube.com/watch?v=5N0_R27hYSI
I hope you see the danger your playing with.
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