With a new twist on an iconic classic, feeding's glass bottle offers style on top of superior sanitizing, recycling, and sustainability . The tempered glass bottle includes a classic slow flow soft silicone nipple with micro air vents to help prevent nipple collapse. By providing a complete line of feeding solutions for your baby's changing needs, - the 1 Glass Bottle in the United States - continues to deliver a twist on an iconic classic. Featuring classic styling with an ergonomic shape, these bottles are easy to clean and assemble as well as easy to hold.Made with tempered glass, Classic Glass Bottles are also designed with safety in mind. This Mother Nature approved bottle comes with s Classic Slow Flow soft silicone nipples. These soft silicone nipples are equipped with Micro Air Vents that prevent nipple collapse and promote a more comfortable feeding experience. To help take the guesswork out of feeding your little one the Classic Glass Bottles feature molded measurement markers in both ounces and milliliters to provide an easy and accurate way to measure the volume of liquids without the risk of the measurements washing off. An added bonus is that these standard neck bottles fit many standard neck breast pumps making it easy to pump directly into the bottle for added convenience.Rest assured that the are free from polycarbonates, PVC and phthalates and are made of food grade material. Classic Glass Bottles, on top of superior sanitizing, offer style, are recyclable and sustainable, making them a great choice for all moms even Mother Nature. Eco- Friendly MOTHER NATURE APPROVED - Being environmentally kind is important to all of us which is why the Feeding tempered glass baby bottle is recyclable, sustainable and safe for the environment. EASY TO HOLD - Feedings classic and iconic shape now has a fun, ergonomic twist These uniquely shaped glass baby bottles are incredibly easy to hold while feeding, ensuring both you and your little one are comfortable. EASY TO CLEAN - Designed with only 3 pieces, the Classic Glass Baby Bottles can be easily assembled and disassembled for a quick, thorough cleaning between feedings. And because there are only a few parts, there is nothing extra to worry about misplacing. These bottles are also dishwasher safe (top rack only), making your busy life a little easier. PUMP DIRECTLY INTO YOUR BABY BOTTLES - Breastfeeding and pumping can be a time consuming task and as a mother you have things to do. Pumping directly into your Glass Baby Bottles is convenient and our bottles will fit onto most standard neck breast pumps.