This might be stupid , but are you tipping the bottle too much ? My daughter did much better when we started keeping her bottles more horizontal when feeding her instead of a 45 degree angle or whatever , in terms of it dribbling out of the side of her mouth . But I never had any idea how to bottle feed so this may not even remotely apply to you . Also we use a formula pitcher to prepare our formula which reduces bubbles and helped a lot with Lo ' s spit up . We had been shaking them before . But she is an excellent burper and practically burps herself so no advice there . Dr Browns bottles , also . Every other bottle seemed to make her sputter like the flow was too fast , but she adjusted to these really well .