S’well bottles are elegant and useful, Portable and chic! The double walled, insulated construction allows beverages stay hot for 12 hours or cold for 12. Constructed of the highest quality stainless steel (18/8 food grade), these bottles are non leaching, toxin free, virtually unbreakable, yet lightweight, with a wide mouth to allow for easy cleaning, adding ice cubes and most of all,enjoyable drinking. With so many features there are so many facts to know!