The stackable plastic container is primarily characterized by a bottom portion, a top portion, a front wall and a back wall and two side walls forming a parallelepiped, the parallelepiped having rounded corners and edges with a mold center plane dividing the parallelepiped through the front wall, the back wall, the top portion and the bottom portion; a handle protruding upwardly from the top portion; a filling and pouring socket protruding upwardly from the top portion in an area adjacent to the front wall, the filling and pouring socket having a shoulder where the top portion and the filling and pouring socket meet; a cap for closing the filling and pouring socket; a U-shaped stacking surface protruding upwardly from the top portion and surrounding the handle, the stacking surface having a planar contact surface for receiving thereon a further identical collapsible plastic container, the U-shaped stacking surface comprising legs extending parallel to the mold center plane and a stacking shoulder connecting the legs and being arranged opposite the filling and pouring socket; and sloped inwardly curved surface areas extending from free ends of the legs in a downward slope toward lateral portions of the front wall adjacent to the side walls to an elevation below the shoulder and extending in an upward slope from the lateral portions to the shoulder of the pouring socket. The sloped inwardly curved surface areas extending from free ends of the legs each have a generally flat downwardly sloping portion extending toward a transition area where the front wall and the side wall merge together, the transition area being at an elevation below the forward shoulder, and a portion curving upwardly from the transition area to the forward shoulder.

It is expedient that the sloped inwardly curved surface area essentially form a plane within a section extending between the legs and the top portion. Preferably, the plane of the sloped inwardly curved surface areas, in the section between the legs and the top portion, extends approximately vertically. In a preferred embodiment, the plane extends at an acute angle relative to the mold center plane toward the filling and pouring socket. In another preferred embodiment, the plane extends at an obtuse angle relative to the mold center plane toward a respective one of the side walls.

It is advantageous that the filling and pouring socket be forwardly positioned such that it protrudes relative to a vertical extension of the front wall, the front wall having a bulge to form a transition to the filling and pouring socket, the legs of the stacking surface being respectively forwardly elongated.

It is furthermore expedient that a top surface of the cap, when in a closing position, is located in a same plane with the stacking surface.