The ornamental design for a reagentcontainer, as shown and described.
FIG. 1 is a rear and right side perspective view of a reagent container, showing our new design;
FIG. 2 is front and left side perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a sectional view thereof taken along line 4-4 in FIG. 3;
FIG. 5 is a perspective view of the front and right side thereof;
FIG. 6 is a left side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a right side elevational view thereof; and,
FIG. 9 is a bottom and right perspective view thereof.
The broken lines, the areas within them, and the areas bounded by both broken lines and solid lines in the drawings depict portions of the reagent container that form no part of the claimed design.