Abstract: A vacuum flask including an outer shell, a cage removably coupled with the outer shell, and a bottom cover coupled to the cage. The bottom cover and outer shell enclose the internal cage when the cage is coupled with the outer shell. The cage is configured to receive a vessel for holding a liquid, an infant bottle, or one or more milk bags. In some examples, the vacuum flask may be used to store, one of a vessel (e.g., container) specified for storing a liquid, an infant bottle, or milk storage bags.