This 17 oz thermos is made from a vacuum insulated, double walled, 304 food grade stainless steel liner with an electrolyzed finish on the inside that will keep your drinks hot for 12 hrs or cold for 24 hrs. It features an screw on, spill-resistant cap and wide mouth opening. A great promotion for corporate giveaways, marathons, gyms, schools and more. Quantity ordered must be in increments of 24 pcs per color.