The Mason Bottle Plastic Cap will fit over the Ball brand metal ring on any regular-mouth mason jar.
- 1 polypropylene plastic cap for Ball brand metal mason jar rings.
- Prevents leakage when secured over the Mason Bottle Silicone Nipple
- When on the go, protects and keeps the nipple sanitary
- Made in the USA
Lids are great. Keep things from spilling. Dishwasher safe.
Perfect, love them
I prefer using the metal rings because the plastic rings don't seal well and leak a lot. So these caps are really useful. They fit onto Ball or Kerr brand metal rings with a snug fit and nice click. (Doesn't work with stainless steel rings, though.)
I purchased these because we needed caps when the bottles are given to daycare. They hold securely and function exactly as expected.
So easy to remove, but stays in place beautifully on the metal rim.