I was just reading an article on the Parents Magazine website about this. Our daugther started drinking from a sippy cup around 6 months, but I'm looking for information about taking the bottle away (she's 16 months now). Even though she drinks from a cup at meals and snacktime, we still have a morning and an evening bottle, and one inbetween. I'm not about going cold turkey, although I'm sure it works fine. I would suggest to just keep trying week after week. Maybe still offer him the bottle, and then offer him a cup at "non bottle" times like during snack or a meal to get him used to it without the intimidation of it immediately replacing the bottle?? I think there are definately ways to go about though if you don't want to just toss them all out one day. The article I read actually suggested not doing that, saying that this is a tender process for little ones and it's more than just hydration and nourishment, it's a time for comfort. I don't think I gave you much help, other than we're going through the same thing (just because we know that it's time to end the bottles). Also, I was just given a little spout that goes on water bottles, no sucking is required, but it's kind of a fun way for little ones to drink from their parents water bottles, it's called the Lil' Topper and it just screws right onto a water bottle. Maybe another option?? Either way, if you don't want to just go cold turkey, I would just keep reintroducing it to him, taking the same approach that they say to take when starting a baby on solid foods. Never forcing it, but always offering it and giving it a try. May seem like a long process, but if that didn't work after weeks, then you could always try cold turkey.