a method for making a multiple compartment container by providing a mold for defining an outside contour surface of the container ; providing a partition member ; locating the partition member within the mold ; the mold making localized contact only with the partition member for uniformly spacing an edge profile of the partition member from the outside contour surface between adjacent compartment regions of the mold ; feeding a plastic material simultaneously into each of the compartment regions of the mold ; and forming the plastic material against the outside contour surface of the mold and against opposite sides of the partition member , the plastic material totally enclosing the partition except to the extent of the localized contact with the mold , the partition member being retained between adjacent compartments of the solidified container following removal from the mold . the molded material thus connects the adjacent compartment regions around substantially all of the edge profile for full structural integrity of the container . the partition member can have protruding prongs for making the localized contact . alternatively or in addition , the mold can have boss portions extending within the outside contour surface for locally contacting the partition member .