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Causerae t1_j5cs8on wrote

Reply to comment by Leonardo_DuProprio in My lunch setup is all set for many years to come. by Leonardo_DuProprio

I've sacrificed a bit of coffee in such an attempt, but I could try harder.

Ofc, it's a 50 year old thermos, so I'm not too bummed. It doesn't leak, it keeps stuff hot long enough (since I guzzle coffee) and it does look good in the kitchen :)

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Robobvious t1_j5e40xt wrote

At fifty years old the insulating layer between the inner walls of the thermos has probably long since disintegrated.

Get a thermos for your thermos.

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General_Albatross t1_j5e5pp2 wrote

Thermoses are insulated with vacuum.

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atfricks t1_j5e7vna wrote

They used the wrong wording, but the issue is almost certainly that the vacuum failed, and it's now just insulated with air.

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