You won't be able to resist bringing this with you everywhere. And yes, to your desk counts! Made from 18/8 food grade 304 stainless steel, this double walled canteen will keep your beverage cold up to 24 hours and warm up to 12 hours. 26 oz., 18/8 food grade 304 stainless steel, double walled, vacuum sealed. Keeps cool for 24 hours. Keeps warm for 12 hours.