Itâs the best thing to happen to feeding since nipples. The revolutionary air-free feeding design of our NURSHâ¢ Silicone Pouch Bottle feature a 100% silicone pouch that collapses as your little one drinks, squeezing out the nasty gas-inducing air that causes colic. No straws, vents or valves hereâso itâs a snap to clean and assemble. The silicone can even be boiled, sterilized, microwaved, and frozen. Boobs, youâve met your match.