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A coke bottle will not support 870 psi. No way, no how. An 40S 2.5 inch (about the size of a coke can) carbon steel pipe that has a thickness of 12 mm is only rated for 533 psig. Your coke can doesn't have a 12 mm temperature treated carbon steel pipe wall. You were definately not making liquid CO2 in that coke can.

Of similar importance, of course, is the thermal expansion/contraction of water over its liquid range ... there is a change in density of 4% between 0degC and 100degC at 1atm. A metric ton of liquid water at 0degC has a volume of 1m^3, while that same metric ton has a volume of 0.962m^3 at 100degC. See this

They don't put the pump at the top - they put it in the bottom. The idea behind maximum suction lift is simple - for every foot you have to 'suck' the water, you decrease the pressure at the top of the water column. At some point, the weight of the water in the tube will pull on the water at the top of the tube hard enought that the partial pressure of the water at a given temperature will equal the pressure in the top of the water column. If you try to lift it more than this all you will do is pump water vapor from the top of the liquid. This is why you design lift pumps to push water rather than pulling it...

There is a better technical explanation here
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For your sake, I hope you were trolling.