Funny you should mention that - I just took a jar out of my freezer, which had one of those old Red Button mason jar lids, and was thinking about how loud those lids popped! I don't know if they are available any longer - I haven't gotten them for ages, but a lot of the jars I use for storing things in still have them.
I haven't been able to find it, but there is a jar in my kitchen that pops in and out, as the temp. changes. Seems I am always in another room when I hear it!
_________________ Dave
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