My DS is 2 and still goes to bed after having his warm milk, HAS to have it, even tonight in 43 degree heat! We only very recently got rid of the Pigeon Mag Mag cup with the Stage 2 spout which is very like a teat. He has warm milk in the morning as well out of a different sippy cup and we managed to get him to take that same cup at night as well...then the Mag Mag "disappeared".

He does like to have a "cuppa tea" which is warm milk in his Bunnykins cup so we are encouraging that at the moment...before we prepare his milk we ask him if he wants a cuppa tea. Sometimes he says yes, other times he says no (usually when he is very tired) so he gets the sippy cup then.

I recommend the Mag Mag as a great way of getting them off the bottle because you can fit it with a Pigeon bottle teat to start, then when they are used to it move on to the Stage 2 spout which is very teat like. (Stage 3 is a straw cap which I never used, didn't fancy cleaning milk out of a straw). Avent cups and bottles have interchangeable teats and spouts, might be another way to go?