Today I will show you a tutorial on creating a two-sided bag for shopping, going to the beach or anything like that. The cut is simple, without fasteners and pockets.
See the pics and read descriptions :)

You need:

1. Two pieces of thick cotton (320 g/sqm) 80 by 150 cm.
2. A plastic bag as a pattern.
3. Chalk / tailor's marker / soap.
4. Threads.
5. Scissors.
6. Tailor's ruler.
7. Pins

Let's start!

Transfer the pattern:

Get four pieces:

Pin and stitch:

Cut off the corners:

Iron the seams:

Turn one detail outside in.

Put the two details face to face.

Pin and stitch the handles:

Iron the seam, make notches, turn outside in and iron again.

Turn inside out, iron, pin the handles and stitch them up to the end:

Iron the seam:

Fold the handles and iron:

Join the two parts, pin:

Stitch, make notches and iron:

Do the same with another side but remember to leave a hole for turning!

Stitch, make notches and turn out, iron:

Sew the hole manually:

Iron.

Ready!

The bag passed the test at the beach, I put two towels, two glasses, tanning, a bottle of water, wallet, a book there... It was comfortable, spacious and bright!