Scientifically proven: Our Advanced Anti-Colic bottles reduce air intake to combat the discomfort of colic, gas and refluxAnti-colic support: With a vented wand and silicone valve that draw air away from baby's tummy. Lab tests prove our anti-colic valve is more than sensitive than any other*Breast-like design: The soft silicone teat flexes and stretches so your baby can bottle feed comfortably at their own natural pace, meaning they ingest less airSimple self-sterilising: The quickest and easiest self-sterilising bottle on the market*, Tommee Tippee Advanced Anti-Colic bottles can be easily self-sterilised in the microwave in just 3 minutesSpill, mess and leakproof: When the screw ring, teat and cap are all secured, this anti-colic baby bottle is completely leakproof, even if it's turned upside down, shaken or dropped