Thermoboxes with drain valve
— the presence of a drain valve in the design of the thermobox (this function is mainly equipped with thermoboxes, see "Type").
In accordance with the name, this valve is designed to drain excess liquid from the working chamber of the device — liquid can accumulate there in the form of condensate or when the ice loaded inside melts. Using a special valve to drain it is much more convenient than turning the entire container over — especially if the latter has a large volume.
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