The ornamental design for a culturecontainer, as shown and described.
FIG. 1 is a front view of a culture container in accordance with the present design;
FIG. 2 is a rear view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a first perspective view thereof;
FIG. 8 is a second perspective view thereof; and,
FIG. 9 is a cross sectional view taken along line 9-9 of FIG. 1.
The dash lines in the drawings depict portions of the culture container that form no part of the claimed design. The dot dash broken lines depict the boundaries of the claim and form no part thereof.