For one thing, tin can rust. If you want to preserve a food and rusting becomes a factor it can only be preserved for so long. Glass, on the other hand, can last forever unless dropped or broken. Some glass jars have tin lids which also might rust and this issue led to the invention of the “lightning jar” which is sealed with a clamp on the outside. Some famous glass canning jars today are also designed to withstand heat as part of the sealing process. These jars could include Ball or Kerr brands, and they can be attractive candidates for canning foods.
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