Hi Maheen,
I have a 750ml 'Drench' sports bottle and i try to drink 1 between 8 and 12, 1 between 12 and 4, and 1 between 4 and 8, i cant drink any after that or i'd be up all night running to the loo!
It is really hard, people do say it gets easier though, so stick with it!
I had a baby...