Food grade silicone bite valve nozzles for health and safe use and elastic for easy replacement.<Br/>feature:<br/>2 pcs a set.<Br/>food grade silicone for health and safe use.<Br/>elastic for easy replacement.<Br/>specification:<br/>material: silicone<br/>color: blue / white (optional)<br/>length: <br/>blue: 3.5Cm / 1.3 In <br/>white: 3cm / 1.1In <br/>package weight: 11-13g / 0.3-0.4Oz<br/>package list:<br/>2 * hydration valve nozzle