Mason Bottle is brilliant in its simplicity: a medical-grade silicone nipple and ring that fits standard Mason jars. Your baby drinks from pure glass with zero plastic. The jars are cheap, endlessly replaceable, and you probably already have them. It's the most eco-friendly bottle option (jars last forever, reduce plastic waste). The downsides are real: glass is heavy (harder for baby to hold), no anti-colic venting, and jars can break if dropped. Best for home use with supervision. At for the nipple kit (jars separate), it's an investment in sustainability.




