Milk Bottle Grocery is a tiny building located on an small island-block among the streets.  It was built in 1930. The large, metal milk bottle on top of the building was added in 1948.

The building is triangular in shape, which is due to the layout of the streets in Oklahoma City. It's shape earned it the nickname, "Triangle Grocery."

It sits on the original alignment of Route 66 (Classen Boulevard).