DS, who is almost 3, clearly doesn't drink enough going by the ammonia stench from his nappies. I always have water available to him in a sippy/straw cup and have water with every meal, but he's still not drinking enough. Some nappies are wet but smelly, some are barely wet and smelly. How much should a child his age be drinking? I'm sure he's not drinking anywhere near enough. I think the main problem is that he's too busy to drink, always on the go.

Any tips on how I can encourage him to drink more would be greatly appreciated.