Dr. Brown's ナチュラルフロー 狭幅 哺乳瓶用 シリコーン乳首 レベル1 2個パック

The vent system still works perfectly with these replacements, so my little one’s feedings stay fuss-free. Nipple shape fits the original bottles just right, and the flow level feels gentle and steady for a newborn.

The silicone is noticeably softer than the ones that came with the starter kit, so the flow feels gentler for my newborn. We’ve had way fewer spit-up episodes since switching, and the level 1 hole size seems just right for her pace.

The vent system on these really does its job—my little one finishes a bottle with way less fussing and burping than before. The soft silicone feels gentle on her gums, and they fit snugly onto the narrow bottles without any leaks.