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  1. 1
    Charles C. Cotton
    235 of 246 people found the following review helpful
    5.0 out of 5 stars
    Use THESE – *NOT* the metal lids, for non-canning storage!, July 31, 2008
    By 

    This review is from: Ball Wide-Mouth Plastic Storage Caps, 8-Count (Kitchen)

    If you want to STORE food in ball/mason jars, rather than CANNING food, you NEED these.

    Here’s why:

    The two part metal lids & caps that come with the Ball jars are for *CANNING*. These are NOT DESIGNED to be AIR TIGHT! The act of *canning* (pressure cooker, etc) creates a vacuum which seals the metal lid to the jar – the screw part is optional and is to simply hold the metal lid IN PLACE in case the canning fails. They are designed like that so that if the canning process is somehow faulty, and bacteria forms inside the jar, the lid will let the gases escape without making the jar EXPLODE. If you fill a jar up with WATER and put one of these metal lid/screw combos on it, and put it on its side, in a short time you will see it is NOT air or even water tight without a vacuum.

    Now, you DO need the metal lids for canning, of course, and also if you’re using one of those vacuum sealers with the jar attachment like the FoodSaver (which I recommend).

    BUT YOU ALSO NEED THESE PLASTIC LIDS for storing anything else you want in the very handy classic ball/mason jars. The plastic lids ARE water and air tight – so they’re perfect for medium-term storage of cereal, cookies, noodles, rice, etc.

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  2. 2
    B. Anderson
    78 of 80 people found the following review helpful
    5.0 out of 5 stars
    Perfect way to store opened canning jars, December 1, 2007
    By 
    B. Anderson –
    (REAL NAME)
      

    Amazon Verified Purchase(What’s this?)

    These are sturdy (long-lasting) and water-tight lids that fit on Ball wide mouth canning jars. They are perfect to use once a canned jar has been opened and will be stored in the refrigerator for a few days or weeks. Also, they make the Ball canning jars more useful as short-term storage containers for soups, etc. because they are so much easier to use than the canning lids and rings. These are a must-have if you use Ball wide mouth canning jars in your kitchen.

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  3. 3
    S. Newton "SallyBR"
    46 of 46 people found the following review helpful
    3.0 out of 5 stars
    Good, not great, April 30, 2009
    By 
    S. Newton “SallyBR” (Manhattan, KS, United States) –
    (REAL NAME)
      

    Amazon Verified Purchase(What’s this?)

    If you are going to use your jars to store dry stuff, I highly recommend these lids. However, for liquids, they do leak. I used them to carry some Oriental style dipping sauce to work, and it made a huge mess in my bag. Not a great experience at all.

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