Cap for the Wide Neck Baby Glass BottleThe HEVEA® 100% natural rubber bottle cap fits to both our 150ml and 250ml (5 oz. and 8.5 oz.) HEVEA wide neck bottles. The cap is designed to fit the bottle neck perfectly tight, without any milk being spilled – not to mention being just that little bit more hygienic. To top it off, the cap has a vacuum-seal finish, so no need to worry about spills on the go either!Description Cap for the Wide Neck Baby Glass Bottle:Fits both the 150ml and 250ml (5 oz. and 8.5 oz.) HEVEA Wide Neck Baby Glass BottleVegan Certified 100% natural rubberSoft, lightweight, with a natural feel Vacuum-sealed for leak-proof storage on the go!Benefits of the Cap for the Wide Neck Baby Glass Bottle:Perfectly safe for your child - completely free from silicone, plastic and other petrochemical substancesNot only are our eco-friendly nipples 100% biodegradable, so is their packaging - we use a FSC® certified box with Earth First® window, made from plantsEasy to attach on and off HEVEA Wide Neck Glass Baby Bottles - no additional plastic needed to attach! Easy to clean and sterilise (see video) – simply sit in freshly boiled water for a few minutes