Wide Neck

Wide Neck
Does anyone find drop-ins for bottles that are not normal, wide-mouth?

My son is 6 months of age were used for the Dr. Browns bottle nipples regularly. We want to bring the use of drop ins and found Avent Playtex and provide a Wide Neck bottles only. He is having difficulty with nipples wide neck. He takes it, but the milk is drained from the sides of his mouth when drinking. We feel bad to lose the milk. Since it is used for the Dr. Browns are trying to find regular bottles ins allowing fall, but couls not find any. Please help if you know everything.

I have never seen regular drop ins for bottles. If you're looking at the change to fall due to the ins Dr. Brown's bottles are BPA free BPA.

WL5 Banjo Wide Neck Long Fifth String