Avent's Natural Response nipple is clever: it has an internal valve that requires active sucking to release milk, mimicking how breastfeeding works. This helps prevent overfeeding and the associated spit-up/gas. The wide breast-shaped nipple promotes natural latch. Anti-colic valve is built into the nipple (not a separate part like Dr. Brown's), making cleaning easier. At /bottle with great availability (Target, Amazon, Walmart everywhere), it's a solid mainstream choice. Note: Same 2024 class-action as Dr. Brown's regarding plastics, but tests showed no harmful chemicals. The ergonomic shape is easy for babies to hold.

