A familiar jar, ready for a new routine. Here are the details to help you choose and use your set:
Jar fit: Fits regular mouth Mason jars. The wide nipple shape does not mean it fits a wide mouth jar. Secure each nipple with one of the included bands.
Comfortable shape: The wide, breast-like design is made to support a comfortable latch for babies who move between breastfeeding and bottle-feeding.
Built-in ventilation: Mason Bottle’s dual-valve system lets air move through the nipple as baby drinks. There are no separate vent tubes, discs, or inserts to keep track of or clean.
Choose your flow: Slow Flow (0–3 months), Medium Flow (3–6 months), Fast Flow (6+ months), or Flexible Flow (6+ months and thicker liquids). These age ranges are a guide; the right flow depends on your baby’s feeding cues.
Tell the flows apart: Slow has one hole; Medium has two holes in a line; Fast has three holes in a triangle; Flexible has a Y-shaped cut.
Materials and origin: Clear, medical-grade silicone nipples made in the USA, paired with silver 18/8 (304-grade) stainless steel bands from Mason Jar Lifestyle.
Everyday care: Nipples and bands are dishwasher safe. Separate the pieces for washing and dry the bands thoroughly.
Before first use: Wash all parts. To sterilize the nipples, Mason Bottle recommends boiling them in water for five minutes.
