This Thermos Stainless Steel King Flask combines a retro design with maximum performance due to its double wall insulation that will retain hot and cold temperatures with ease. Hot drinks will keep warm for 18 hours whereas cold drinks will keep their temperature for a full 24 hours. It is cool to touch when containing hot liquids and sweat-proof with cold liquids. It features a twist and pour stopper allowing you to pour without removing the stopper for ease and safety. The insulated lid doubles as a cup so you can sit and pour a drink any where. The flask is hardwearing due to stainless steel interior and exterior.