The SoftFlex™ Natural Sipper™ has a unique one piece No-Spill™ soft silicone spout that is easy to use, easy to clean and encourages a natural drinking action that promotes healthy oral development. It has been specially designed so the valve opens with minimum pressure and doesn't require constant sucking that can damage new teeth and soft palates. It also features removable easy-grip handles which are perfect for a child’s transition to self feeding. The durable handles are designed for small hands and are comfortable and easy to hold. All of our Natural Touch™ sipper cups and infafeeders are fully interchangeable with the SoftFlex™ nursers and nipple system for your ultimate convenience and flexibility.