Here is a link to a way to use those old plastic drink bottles.
I don’t know the language but the video is clear that one can high speed rotate the bottle and cut a thin filament of the plastic to make a long length of what resembles nylon fishing line, which can be used like string.
Bugs Bunny: "I speak softly, but I carry a big stick."
Yosemite Sam: "Oh yeah? Well I speak LOUD! and I carry a BIGGER stick! and I use it, too!" BAM!