Baby Plus Feeding products Completely Clinically proven to reduce colic, Decreases spit-up, burping, and gas, Shown to better preserve nutrients in breast milk and formula, Aids in digestion for a good night's sleep, Offers a flow rate that supports breastfeeding. Always use with adult supervision, Before each use inspect the product .Throw away at the first sign of damage or weakness, Always check food temperature before feeding, under license of Babyplus international -England and UK. Ideal shape of the nipple fits perfectly into" sucking fossa “and part of the nipple has according like construction for the natural peristaltic motion of your baby 's tongue, elasticity and collapse proof is important function for a nipple to encourage baby's natural sucking.