This is my take on a classic graphic portfolio.
PS: a sewing machine makes this easier BUT you could get away with sewing this by hand.
I also think that investing in a sewing machine is invaluable. You can pick one up for $50 bucks and it'll do almost everything you need. The first machine I ever purchased was a brother from Sears... I think I spent $60 and used it for 8 years, I've upgraded but I still have that machine.
CANVAS / PAINT / PAINT BRUSHES / PAINTERS TAPE / ZIPPER / COTTON FABRIC
TIPS: Make sure that you get a thick canvas, duck cloth is best. You want the bag to hold its shape. Fabric stiffener works well too. Martha Stewart has one thats water resistant. I might throw this over my bag just to protect it.
Cut a 15.5"x 20" rectangle from the canvas. I taped my fabric to my craft table, because you tape all the edges I didn't get any on the table. You could tape this to a piece of cardboard too.
Pretty self explanatory with the stripes. I eye balled mine, you could measure the stripes... But It's such a busy pattern if you're a little off you really don't see it.
**This is obvious, but make sure you let the paint dry before you tape off the next section.
1. Pick out a fabric for the liner. I used a dish towel, I liked the pattern and they had a two pack on sale. Cut it with a little seam allowance at the top. So 15.5"x 20.5" then cut that in half.
2. Line up the zipper at the top of the fabric. Right side of the zipper facing the right side of outer fabric.
4. You should have a rectangle. Make sure the zipper is open so you can turn the bag right side out. Pin and sew the sides of the bag.
5. Sew the bottom of the liner. Make sure that you leave a gap in the middle so you can turn the back inside out
6. Carefully turn the bag right side out... The stiff fabric makes it difficult so go slow. Pin and top stitch the lining closed. Push the lining inside the bag.