I know the two liter bottles can handle 90 psi (won't say safely), that's about double the pressure for a typical soda and 5-6 times what you'd want for a cider. Your best bet is to prime before bottling.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk