Ah mama, sa 4 months basta malambot ang nipple at hindi masyadong mabilis ang flow, okay na talaga! A few of us tried Philips Avent at Tommee Tippee, super durable at madaling linisin, plus ang babies namin ay hindi nag-reject, hehe. Some moms also swear by Pigeon kasi affordable at available everywhere, so depende talaga sa baby mo kung ano ang gusto niya, pero honestly wag ka mag-alala madami mang options, try and error lang!