That Natural Feeling: Want it to feel real? Then it needs to mimic nature; Easy to latch and encourages proper tongue positioningAir-Free Feeding: Works in tandem with our Silicone Pouch Bottle, without valves or ventsThe Safety of Silicone: Squishy, soft and made without icky toxins like BPA and PVCEasy to Clean: Dishwasher safe, can be boiled or sterilizedStage 0: 0m+