I've had these previously, but never with an original case; they were usually discarded eventually or left behind. A great design, the cup is collapsible and made of stainless steel, with handles on the back that fold out. It slips into the leatherette case for carrying in the pocket, bag or basket, and off you go cycling and whenever thirst occurs, you just stop and have a "proper" drink out of a cup; no bottles here! These were very popular during the early 1900's when cycling became all the rage. The case measures 2 3/4" diameter by 2 1/4" tall, while the cup extended measures 3 1/2" by 2 1/3". A fun piece to have and to use!