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Message: <blockquote data-quote="urbanracer" data-source="post: 2645453" data-attributes="member: 140811">Sorry cannot answer your question but I and a few others here use the <a href="https://friouk.com/product/large-wallet/#" target="_blank">Frio travel wallet</a> , also available on Amazon and other placesIt works by imersing the inner bag in water until the crystals expand and then they become the cooling medium. The crystals take several days to dry out (the outer bag feels dry by the way) and then you simply re-immerse the inner bag to recharge if needed. Easily done in a hotel sink etc.When you get home, let them dry out and they will fit into a small space in any cupboard for re-use at a later date.I have always used them when travelling in Philippines without any problems and the temperature there is in the high 30's °C when we usually go around May time.Never had any problems with airport security either.Edited to add:-Just looked at the Disoncare website - seems to me that what you're looking at there is a very expensive thermos flask ??? - albeit with a fancy temperature display in the top. One could probably acheive the same outcome with a thermos flask and some cold gel packs.</blockquote>

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