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Thermos flask
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My wife put ice in a thermos flask to put in cold drinks but the flask broke. I understood you could do this. Why did it happen, can anyone explain?
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For more on marking an answer as the "Best Answer", please visit our FAQ.As we have been using them with crushed ice for more years than I care to remember. I can only presume that your good lady dropped cubes in and broke the inner skin which is very thin in domestic flasks. Maybe there was a hairline fracture from a fall before and the ice broke the 'camel's back'. Drooping a vacuum flask weakens the neck of the inner which is where it is supported.
The latest one we got has a very wide neck to accommodate putting in the ice.
The latest one we got has a very wide neck to accommodate putting in the ice.