No. You can't be the source
Hi thanks for writing back.
you suffered long back due to bad food will not spread from you. Since it was bacterial infection it would have been completely cleared with the antibiotics you have taken and your immunity. You cannot be the source of the infection.
Some infection like TB, typhoid
can spread for long duration if not treated. But you dont have any features of them and you are healthy. So you cant be the source.
1/7-8 person getting affected with sharing your bottle may be due to his own low immunity or just thinking the normal body responce as illness, since only mild feverish without any other symptoms. So you are not required to worry.
If we consider you are spreading illness then all those come to your contact should have been affected, and you are very health. So be relaxed.
Treatment: Diagnosing and management if there is any illness. As the illness, signs and symptoms lead us to diagnose if any problem.
I hope this information helps you.