I added the notice because your answer was attracting many flags and comments (see also Ekadh Singh's answer which explains the purpose of the notice). Most of these interactions were not constructive:
The answer was flagged as: 'Rude or abusive', "misinformation", and propaganda.
There was a debate in comments about the use of the term 'bottle ...
Now that this post has been applied to answers as well as questions, I think it would be a good idea to create a variant of the post notice that removes the part “answers should only be used to answer the question” because this causes some confusion when this post notice is placed on answers. Example
I think you misunderstood the meaning of the controversial post notice. The notice said
Controversial Post — You may use comments ONLY to suggest improvements. You may use answers ONLY to provide a solution to the specific question asked below. Moderators will remove debates, arguments or opinions without notice.
Using comments only to suggest improvements ...