I claim the ornamental design for a case with straps, as shown and described.
FIG. 1 is a perspective view of a case with straps;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a perspective view thereof in an opened configuration.
Each of the dotted lines, dash-dot lines, and dash lines shown in the drawings are included for purposes of illustrating environment and form no part of the claimed design. The surface shading lines show contour and/or distinguish between open and solid areas. The surface shading lines are not surface ornamentation.