Dr. Brown's internal vent system has clinical studies behind it—the air channels through the vent, not the milk, so baby swallows less air. Parents swear it reduces colic symptoms. The Options+ line adds flexibility: use the vent for newborns, remove it when baby's digestive system matures. At /bottle, it's half the price of Comotomo. The trade-off: more parts to clean (vent, reservoir, nipple). Note: 2024 class-action lawsuits alleged microplastic leaching when heated, but independent tests found no BPA/lead/phthalates. We recommend hand-washing or low-heat dishwasher to be safe.
