Keep liquids hot or cold in the sleek and compact Royalford RF8466 Stainless Steel Double Wall Vacuum Flask. Made with a double wall design with a stainless steel inner pot, this flask effectively maintains the temperature of the liquid inside. Moreover, this Royalford vacuum flask is quite durable, as it is made from stainless steel. You can store adequate amounts of beverage in this vacuum flask owing to its large 2L capacity.