The Tommee Tippee Natural Start Anti-Colic baby bottles are designed for a comfortable feeding experience. Made from soft silicone, these 260ml bottles feature a breast-like teat that flexes and stretches to encourage a natural latch, helping to prevent nipple confusion. The anti-colic valve is proven to reduce air ingestion, minimizing feeding discomfort and colic symptoms. These bottles are simple to self-sterilise in the microwave in just 3 minutes. When assembled, the screw ring, teat, and cap create a leakproof seal, making them spill-proof even when upside down, shaken, or dropped. The color is clear.