Decide how many packets you want to use and how to sort them. As you can see in the picture of the finished bag I used 6 for the front/back and 2 for the sides.
Put the first two packages next to each other, overlapping just a tiny bit. Fix with adhesive tape (from the back)
Stitch the packages together, using a denim needle. The sewing machines might have problems transporting the packages, maybe it will also skip some stitches. You can use wide zigzag stitch or straight stitch, depending on personal taste ^^
For the front and back side just make two rows of three packages and glue/stitch those together afterwards.
Make the rest of the sides the same way.
Cut the base out of the denim. You might want to double the fabric for this to make it sturdier. Use the width of the front and side panel as measures. Remember to add seam allowances!
Cut the lining out of the denim, just use the capri sun pieces as patterns. Don't forget to add another base piece. Remember to add seam allowances!
Sew the first capri sun piece to the base, left side on right side. As you can see, capri sun packages on fabric is even trickier than just sewing capri sun packages...
Sew the remaining capri sun pieces to the base.
Stitch the capri sun pieces together, left side on left side. This means the seams will show on the right side, which looks pretty cool in my opinion.
A picture of how I made the inside pocket, maybe it will help to make your own... I just don't know how to explain that Oo
Inside pocket again, sewn on one of the lining pieces.
The... erm... flap(?) to close the inside pocket.
... and the finished inside pocket.
Sew the sides of the lining. You might want to leave one side open to make adding the base piece easier. I forgot that xD
Add the base.
Add the straps to the lining, facing the obviously wrong way. The top edge of the lining will be turned down in the next step, so the straps will show the right way up ^^ In this step you can use a piece of strap material to add the d-ring, too.
Turn the top edge down (about 1cm, maybe a bit more), out the lining into the bag and stitch the top edge. Congrats, your bag is finished =)