For some reason it's really difficult to get DD to drink enough. If left to her own devices she would barely drink at all.
We give her a drink every morning, which she will have a sip of unless we stand over her. She takes a bottle to school, but it comes home with the same amount of water in it. Same happens after school. We tried drawing lines on the bottle to let her know how much she should drink at break and at lunch, which worked for 2 days then stopped. We tried sending her in with cartons of fruit juice (school were happy with this), hoping that having something more tasty would help, but those come back too.
At home she gets offered squash occasionally, but same result.
The only time she willingly gets a drink is at bed time as a way to delay going to sleep 
Any ideas? Because having to nag her to drink is ridiculous.
We did try taking the pressure off and not nagging, but then she just didn't drink and ended up constipated. We don't get angry or tell her off - we don't want to make it stressful or cause her to dig her heels in. But we do need her to drink more than a glass and a bit a day.