A portable temperature-stable storage device for at least one object, the portable temperature-stable storage device comprising: a primary chamber (100) configured to store the at least one object; a secondary chamber (120) comprising: a first barrier (121) configured to, in an open configuration, provide access from external surroundings of the portable temperature-stable storage device to inside the secondary chamber and, in a closed configuration, prevent access from external surroundings of the portable temperature-stable storage device to inside the secondary chamber, and a second barrier (122) configured to, in an open configuration, provide access from the secondary chamber to the primary chamber and, in a closed configuration, prevent access from the secondary chamber to the primary chamber; and wherein the second barrier is adjustable between the open configuration and the closed configuration whilst the first barrier is in the closed configuration.
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