The Biggest Innovation in Small Feeding Lil Jumbl's flagship baby feeding system effectively reinvents the way you feed your little one. Exclusively designed following advice and guidance from leading pediatricians, this feeding system enables you to feed your baby in an upright (sitting) position rather than in a horizontal (laying down) position. What does this accomplish? A great deal of good, actually: It helps prevent colic, gas build up, ear infections and reflux. It also improves overall feeding by making it easier for your baby to draw breast milk, formula, etc. from the bottle. Try it once, and neither you nor your baby will ever favor other bottles again. Superior, Patent Pending Flow Control To take this innovation even further, we've added a patent pending, custom-designed vented disc at the point of connection to the bottle. The disc's machined holes allow for air to gently flow into the bottle while your baby draws on the nipple, making feeding smooth, uninterrupted and, most importantly, effortless. It thus eliminates any vacuum pressure buildup within the bottle, which would otherwise strain your baby's attempts at feeding. And there's more! Thanks to the air replacing the liquid in the bottle, the liquid that's already in the 'straw' remains there. No backflow means less sucking needed. Various Nipples = Personalized Comfort Your purchase of the Lil Jumbl hands-free feeding system includes 3 sets of bottle nipples: 1 slow flow nipple, 1 medium flow nipple, and 1 regular flow nipple. Depending on your baby's age, feeding habits, oral dexterity, etc., you may find one nipple to be a better fit than the others. (Experiment freely; it's a matter of baby preference.) Last but not least, all three are made of baby-safe BPA-free and lead-free materials to promote both your baby's health and your peace of mind.