Packaging empty bottles - like drinking water bottles - just to ship them to another location is cost-prohibitive. Bottles like wiper fluid, oil, etc could be a different story, I admit. This is what water bottles look like:but often very near or shipping would not be worth it. I suppose it depends on volume. I think there blow molded correct?
I assumed the smaller stuff like 16 oz ones were thermo formed? Never gotten much involved with that stuff.
The water bottlers will buy them like this and they're likely shipped in giant cardboard crates loose just like shown. The final process (shape) is done on-site.