They help maintain temperature An extra layer of insulation for thermos flasks protects them from changes in ambient temperature and helps maintain the temperature of food. A warm touch for thermos flasks of all sizes, for liquids and solids. Thermibag insulated cases have been specially designed for thermos flasks of approximately 350 ml, 500 ml, and 700 ml depending on the model, and their design allows them to accompany the different thermos flasks with the delicate ivory color characteristic of this collection. Resistant materials for greater protection Made from highly resistant materials, which improve the preservation of the thermos by protecting it from abrasions, impacts, and scratches. Top zipper opening With the zipper opening at the top of the cooler bag, the thermos can be used conveniently without having to remove it. Take it anywhere Parents can choose the size that best suits each thermos and take it anywhere. Perfect for traveling or leaving your child in someone else's care. In addition, the bag has a handle for convenient hanging on a stroller.