The ornamental design for a utilitycontainer, as shown and described.
FIG. 1 is a perspective view of utility container showing my new design;
FIG. 2 is a perspective view thereof in an open configuration;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a back elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a right side elevation view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is a perspective view showing the cross-section thereof at section line 9-9 in FIG. 7.
The broken line showing in FIGS. 1-2 and 4-9 of the drawings are included for the purpose of illustrating unclaimed portions of the utility container and forms no part of the claimed design.