best bottle for EBF baby

My 1 month old baby boy is exclusively breast fed (haven't had a chance to pump yet). But recently he was diagnosised with reflux and the only way I can get him to take the medicine is by bottle and formula. I have playtex drop ins with the breast like nipple and tommee tippe and he is sucking air on both of them because he can't latch great. I hate that there are only silicon nipples- there is nothing natural about silicon! I'd love to find a latex nipple- I think he would latch that much better!