Random ideas to be shot off

1, can coke reused from the coke-and-mentos experiment produce the same reaction? reused as in i find a way to channel erupted coke into a container and use them for the experiment again.
2, the idea in 1 itself can be used and an experiment - can reused coke work?
3, does coke taken out of its original packaging work in the mentos experiment? in all my research no one seems to address this issue. but by some explanations - that the coke geyser comes from the CO2 in the coke - would point to that coke transferred into another bottle would not work, as the CO2 in coke would be lost?
4, DOES ph affect the outcome? since no one seems to be sure about the cause of this phenomenon....pH can affect the results for all we know.