Got my lab coat on.
https://www.screwfix.com/p/no-nonsen...de-750ml/87934
and superglue
Combination of both will do the job, just won’t be able to get the head off again though.
Alternative I could get an adapter built for you, I have a friend who has an amazing 3D printer business.
The dims of the thread can create a tight plastic adapter to the plastic neck support.
Best
Paul