What’s the best bottle for breastfed babies? Advices or tips on how to effectively offer bottle?

My baby is refusing to feed from nursing bottles. I tried Como tomo, Avent Natural, Pigeon wide neck and some cheap brands but none worked. My baby is turning 6 months old and I need to go back to work. Please give me tips/recommendations on how to handle bottle rejection. Thank you! #advicepls #firstmom #pleasehelp #advicemommies