Dr Brown's Blue Deco w/Sippy Spout + L3 Nipple Blue Feeding-SpoutCups One possible cause is that

One possible cause is that conventional bottles are poorly designed to allow taking in excessive air during feeding

and we promise you an abundance of silent joy

Product dimensions:7

as well as microfiber interior for greater comfort

Designed for hygienic drying

Dr Brown's Blue Deco w/Sippy Spout + L3 Nipple Blue Feeding-SpoutCups One possible cause is thatDr. Brown's 8 oz. 2 in 1 Transition Bottle Kit Blue Ease your little one from bottle to cup with the Dr. Brown's 2 in 1 Transition Bottle Kit. It comes with a 8oz bottle with a nipple and sippy spout to help your baby learn to sip from a spout. The silicone spout is soft and easy to sip from to make the transition easier.