How To Train Baby To Bottle Feed

Hello mommies! Any advice po how to train my LO to bottle feed? She's 4 months po exclusive breastfeed sya since birth. Magwowork na po ksi ako on June 20. Worried ako baka magutom sya kasi she's refusing bottles. Nagwawala pag pinapadede. Milk ko parn nman, nagpapump po ako. TIA