Leaks can ruin your day and your furniture! This Non-Drip Bottle can prevent drips and spills with a pressure-sensitive Vari-Flo valve feature built right into the nipple, ensuring fluid only flows out of nipple with sucking actions of baby. The special valve closes when sucking action ceases, ensuring a leak-resistant bottle. To make feeding even more fuss-free, the sides of the nipple features nubs and valves that encourage baby to latch-on, while the valves help to reduce air intake that can lead to colic.