dd1 is a non-drinker.
she is not doing too badly at the moment, and will drink reasonably well, but we have had some corking times with her - she stopped drinking completely (honestly, not a single drop of liquid passed her lips) for 9 months. that was very hard.
what kind of things will your ds eat, Mad?
I kept dd1's fluid intake up by giving her soup, curries, overcooked rice, yoghurt, jelly etc - it all counts, and the important thing is to avoid constipation.
woudl your ds consider ice lollies?
I know none of this helps for time at school, but if you can top him up beofr ehe goes, and be waiting with something for him when he finishes it is a start.
what is it about drinking he doesn't like?
dd1 cannot bear to have liquid touch her lips, even now when she is is on a relatively good phase with her drinking.
she drank juice out of cartons for ages, the lunch box sized ones, with a straw, and now has diluted odwn juice form a Camelbak sports bottle.
we played lots of water games with dd1 when she was on drinking strike - eg squirting water into each others mouths using a 5ml syringe, or dripping water using a soaked sponge/flannel - very messy, but not so much of a problem when it is warm!
It has been a long slow road with dd1, but she usually drinks about 300-400ml a day now, which is really good for her.