The ornamental design for a diaper with a built-in pouch, as shown and described.
FIG. 1 is an exploded perspective view of a diaper with a built-in pouch with the wrapping feature deployed from the pouch, showing my new design;
FIG. 2 is a non-exploded front perspective view thereof;
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a rear view of FIG. 2;
FIG. 5 is a right view of FIG. 2, with a left view being a mirror image;
FIG. 6 is a top view of FIG. 2; and,
FIG. 7 is a bottom view of FIG. 2.
The broken line showing of a square on the straps in the figures is for the purpose of illustrating an attachment point and forms no part of the claimed design.
The broken line showing of a top portion of the pocket in the figures is for the purpose of illustrating a sealable opening in the pocket and forms no part of the claimed design.