I claim the ornamental design for an embossed container, as shown and described.
FIG. 1 is a top perspective view of an embossed container, embodying my new design; and,
FIG. 2 is a front elevation view thereof, the rear, left and right side elevation views being identical thereto.
The broken line showing of the container structures and embossings is for the purpose of illustrating portions of the embossed container and forms no part of the claimed design.