1. do the bottles take a flavor set ?
2. how long do the bottles last ?
They last until empty and then fill them or slam a new cartridge.... I mean bottle.... HaI don't know what you mean by this
That 100% depends on the brand
I don't know what you mean by this
That 100% depends on the brand
fill bottle, use it till empty. clean it. different juice = does the new juice have a flavor of the last juice ?
how about after a month etc of use ?
ok, fair enough.
I rinse mine with vodka when changing flavors and it's never been a issue for me at least
However, I never use commercial juice and some folks complain about some brands of juice "owning" a bottle once it's been through it a few times