The Original Mason Bottle makes transitioning between breast and bottle a breeze for babies. Mason Bottle is also the most eco-friendly, parent-friendly, and budget-friendly glass baby bottle on the market! Mason jars are freezer safe so you can easily store breast milk in the mason jars and then warm and serve from the same jar AND you can use the jars to store homemade baby food or use as a weaning cup. Benefits of Mason Bottles: Multi-purpose—can be used from infancy to adulthood Milk flows smoothly with no air bubbles and no leaking Dual-valve ventilation system to prevent gas and colic Reduces clutter Specifications: Includes: 4 oz. or 8 oz. glass mason jar Rust-proof plastic ring (will fit any regular-mouth mason jar) 2-way cap: attach to hinge or keep it removed Slow flow wide breast-like silicone nipple Easy to clean Non-Toxic Free from BPA, PVC, BPS, phthalates Nipple and cap made in the USA by Mason Bottle Glass jar made in China by Mason Bottle **All plastic components are recyclable and BPA-Free
