DS is just over 8m. I have tried everything I can think of to encourage him to drink from a cup but no joy so far. If I try to do it for him he clamps his mouth shut and gets upset. I've tried lots of different cups. I've tried putting milk in it. I've tried giving him one to play with - it's the one "toy" that doesn't make a beeline for his mouth. I've tried abandoning all attempts completely for a while and then trying again. I've tried only offering him water that way (ie no bottle) and he ended up constipated (he drinks a lot at meals). The most progress we have made is changing the spout of an Avent Magic cup to a teat which he will take if I do it but he won't hold the handles so it's just like a bottle anyway. What can I do to encourage him?