The Mason Bottle Plastic Ring + Cap has been designed to replace the standard metal mason jar ring - no more rust.
This product is compatible with any regular-mouth mason jar. It also fits perfectly with Mason Bottle's other products, including our silicone nipples, the sippy straw top and the silicone squeeze pouch.
YOUR CUSTOMERS WILL LOVE:
Durable and easy to clean
Use the cap in two ways - snap close, or attach by the hinge