somehow it seems to me that a whole chunk has been missed out of this story. A child asks for a drink, teacher says it's not the right time for drinks, child gets flask from lunchbox, teacher holds it over his head, child pushes teacher, teacher threatens exclusion if it happens again.
Well, is this the first time the child has asked for a drink? has the teacher provided a cup of water many times already that day? has the teacher warned to child not to ask again? was break time coming up? I don't know what to think.
I can see good reasons why a teacher would not allow water flasks permanently on a desk. My sons are fiddlers. I guarantee they would be forever unscrewing the lids and inevitably water would get spilt. At worst you could have quite a water fight with 30 children all squirting their drinks bottles at each other.
I cannot imagine that a teacher or classroom assistant would not respond to a plea for a drink if it happened the once, unless lunchtinme or breaktime was about to start. If dilligaf's boy had only asked the once, and the teacher responded as she did, then that's bad.
A slightly similar thing happened with my son in reception. Apparently he kept asking if he could go off to the loos by himself during lesson time. The teachers were fine about him doing this to begin with, but cottoned on to the fact that he was more happy to be in the loos than in the classroom. The teacher talked to us about the need for ds to fit in with school routine and said she would stop letting him go to the loo alone during lesson time if this continued. He would be allowed to go only when an assistant was free to take him. I had no problem with this - it didn't feel like she was being harsh because she had spoken to us, and my son was making going to the loo into a game.