"The Classic Jug was designed by Ole Palsby in 1985, who named it Modern Classic No. 1. The Jug is the world's best-selling thermos design and has won numerous awards and is on display at the Museum of Modern Art (MOMA) in New York. I today, the round classic appears as elegant, contemporary and aesthetically captivating as when it appeared more than 30 years ago. The ball jug keeps the contents hot/cold for a long time, as the ball is the geometric shape with the largest volume and smallest surface. Double-walled AlfiDur insert in insulating and hardened vacuum glass. " Practical screw cap. " Keeps liquid hot for 12 hours, keeps liquid cold for 24 hours."