Hi there,
This is Bogdan from Romania.
I'm a mechanical engineer - specialized in the industrial robotic field, 3D designer and modeler (from time to time and some projects I could make the functional prototype too).
I'm doing product design, industrial design, reverse engineering, ideation, etc.
I have over 15 years experience working on various systems/devices across multiple industries, from concept to launch.
1 - I can't help with the sourcing of the bottles, shrinks and caps - why don't you open a RFQ on Alibaba?...
2 - you said 5000 bottle for the start - per month/year?
3 - I could help you designing a SPM (special purpose machine) for filling the bottles, inserting the purer, applying the cap and shrink it... but this will be a separate project
Regards
Bogdan