It should be like this
it remains detached from the lid.
Na Doctor sahib, try again... i think you are not fixing it correctly.Do you live or work somewhere close to G-9 Islamabad?
let me give it a try today. I work in I-9
Yes.. I am sure its just matter of putting it correctly and being a rubber seal it is pretty flexible.. once fitted correctly it should be like the one that I have posted.Good luck!