Found some stuff at Auto Zone that I will try to glue up my overflow bottle with. The package actually shows an overflow bottle on the label so I'll see if this is going to work. It does say on the package not recommended for polyetholine type plastics but I sanded and cleaned the area to be glued real well so it should work. As long as it will with stand heat and antifreeze it should work. I looked it up in the internet and it didn't say anything about that just not to use for patching fuel tanks.
It's not the destination, it's the journey.