need baby advice

My pedi says that my ds16 months is using his pacifier to much and it's causing his teeth to shift. 
He only uses it at night and naps was never one to walk around with it all day. I realized though that the nipple on it and his bottles that we used were the same shape (long & narrow).
 I want to get rid of the bottle all together but haven't done so yet and I went out and bought orthodontic pacifiers but he won't use them bc of the nipple. 
Did you all do it cold turkey or gradually stop offering ? 

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