Weaning my son off formula?

My son loved his formula and bottle!!! Lol he hated cold things drinks I wasn't sure if I would ever get him off of warm formula and his bottle lol that's how much he loved it. When he got about 10 and a half mos old I started to try reg milk in his bottle and sippy he like it but it was cold and he wasn't too sure. About 11 mos he started to bit his bottle and stuff, he started to kinda drink a little cold milk. Finally his bday passed about a week after I threw all his bottles away and gave him a sippy of milk he drank it and was ok with it. I didn't have to go out and buy anymore formula or new bottles. It just takes time and alot of hard work but if you do these I promise he will be off it by his bday or shortly after. It seems like your just worried he won't be off in time, that's exactly how I was but it will work just try these things and start making his bottles a little colder than normal. Hope I helped.