Come and Check Our Branding Solutions.Designed with double-walled and made from high quality food grade 18/8 stainless steel to keep your drink icy for up to 24 hours, and hot for up to 12 hours. Made of food-grade 18/8 stainless steel, the water flask is preservative, anti-oxidation and extended lifespan. Vacuum sealed area reduces the transfer of temperature to have thermal insulation. Pls check inventory and detailed info before placing your orders.