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Are Judge preserving jars suitable for sterilisation in hot water or oven, and if they are, what temperature the glass and the lid seal can safely be heated to / hot liquids poured in?
I can confirm they can go into boiling water for sterilisation.
They glass jars can go into an oven but not the lids and these can distorted.
The jars can only go into an oven upto 120°c.
I have about 30 of these in varying sizes. They are so pretty that I use them to store - and display - all my nuts, seeds, grains, etc. on my kitchen dresser. It keeps the dry-goods airtight and eliminates plastic - form and function at its best. Easy to clean - I've shaken / mixed a homemade dressing in one before too.