Is there a reason the object needs interior geometry? There’s almost always work-arounds for when a “transparent” container needs to open (if that’s the requirement) with textures or other tricks - you just have to explain to us what the purpose of the asset is first.
And if the object never opens, don’t bother with the interior geometry at all.
Is the mesh was made in Blender, probably the faces inside the bottle are inverted, so when you make it transparent what you see inside the bottle is not what you modeled.
I just checked the requirements for this specific object and it showed up it will always be closed, thank you for reminding me I have to make sure of what I want to acheive.