Level 1 - for feeding newborns:
Level 2 - for feeding infants aged 3 months+;
Level 3 - for feeding infants aged 6 months+:
Level 4 - for more aggressive feeders:
Y-Cut - faster flow for thicker liquids.
-Reduces colic, vomiting, reflux, burping, and wind;
-Prevents air bubbles from forming in milk or formula;
-Helps reduce fluid in the ear;
-Prevents nipple collapse