Pevely Dairy founded in the 1880s, was one of four large dairies that evolved from a group of small dairies located in St. Louis at the turn of the twentieth century.  Delivery of milk was made by horse-drawn wagons.  Milk was delivered in bottles with cream on top and a round piece of cardboard as a stopper.  Horses were so well trained on their route that they knew when to stop for a delivery.  As a publicity stunt the dairy purchased two trained zebras named Hans and Tanta from a circus and had them pull a dairy wagon. The museum has an original horse-drawn milk wagon that was originally owned by Pevely Dairy. Here is a video of a zebra-drawn milk delivery.