Boolean strange behavior

When add a boolean modifier and change the option ti intersect I should see the bottom hals but It does not show the bottom half Why ? What am I doing wrong

water-bottle 3.blend (1.3 MB)

Turn the Plain’s Normals upside down

dsasf.blend (1.3 MB)

Thanks youre welcome
Why is the eevee render getting so slow.
I have tried this liquid look on a low poly can and as soon as the boolean is added things getting very slow. I have 4 core cpu and rtx3060 gpu.


jerryCan_2.blend (1.2 MB)