This is one of the cutest beverage menus used on a railroad. When folded, the front and back show the silhouette of a Union Pacific streamliner. When unfolded and rotated 90 degrees, the menu forms the silhouette of a cocktail shaker. The beverage side also seems to be coated with a thin sheet of aluminum or aluminum-like paper to remind passengers of the aluminum train bodies, which (after 60 or so years) makes that side look somewhat crumpled.
Although the streamliner on the cover doesn’t have an elevated cab, its paint scheme and front grill otherwise resemble the M-10003 through M-10006. These were delivered in 1936 and lasted until 1953, so the undated menu could have been from any time in that period. The prices–30 cents for a martini, as little as 60 cents for a half-bottle of California wine–suggest this particular edition probably came out before the war.