The Mondri mug is based upon patterns used in the DeStijl movement in Holland in the 1920's of which Piet Mondrian was a member. The rings around the mug allow for a better grip while reducing heat to the touch.  Porcelain, approximately 4.3 inches tall, 7 oz/200 ml capacity, the rubber rings are removeable. This mug is deisgned by Frank Kerdil for the Philadelphia Museum of Art.  Gift boxed and dishwasher safe.