The Lion and Lady Storage Cap achieves many things! Not only will it allow for safe transport of liquids, it it facilitates the storage and freezing of breastmilk or puree. You can heat/defrost breastmilk or puree in a hot water bath (keep the lid on). Great snack container when finger foods come around all too quickly! The lids prolong the life and extend the usability of the stainless steel container.