This black and silver Serendipity 17 oz. bottle is stainless steel, and vacuum sealed. It keeps beverages cold for 24 hours, and hot for 12 hours. This product fits in a standard sized cup-holder, and does not condensate. It's mouth is wide enough for ice cubes, and drip-free sipping. This drinking bottle complies with CPSIA, and FDA regulations, and is non-toxic, non-leaching and BPA-free.