Another important factor to consider is the lid. Mason jar lids come in two main types: two-piece lids with a separate ring and flat top, and one-piece lids with a built-in screw-on top.
Sarah Scoop on MSN9mon
Can You Put Mason Jar Lids in the OvenEver wondered what makes mason jar lids so effective at preserving your food? It all comes down to their composition.
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