The vacuum jug with the unique rocker stopper was created by the Danish designer Erik Magnussen and it is a design icon around the world. Made in Denmark, this sleek jug 1 Litre jug has an insulating glass insert keeps the liquid hot for 9.5 hours, and cold for 19 hours. Plus, the rocker stopper has a screw cap for picnics making transportation of liquids easy and spill-free.