First, cut two pieces of 35X40cm surface cloth and two pieces of white auxiliary cotton with the same size respectively. Put the auxiliary cotton on the back of the face cloth and fix it with vertical seams every 5CM. After the fixing is completed, cut off the gap of 8×8cm on both sides of the bottom, face two pieces of face cloth with auxiliary surface fixed on the back, and sew the two sides with the straight edge of the bottom (do not sew the corner position of 8×8cm).

Second, pull open the unstitched gap of the bag horizontally. Make the horizontal side face to face, sew the edges, and the same is true on both sides. Turn the bag over to the front and you can see the initial shape of the bag. Let's sew the lining in exactly the same way, and then put the lining into the bag.

3. Align the upper opening of the cloth bag and sew a circle along the edge of the upper opening of the cloth bag to fix the inner and outer cloth together. After the above, cut a piece of cloth with a width of 6CM, sew the cloth on the cloth bag at a position 2CM away from the bag mouth, turn the good edge into the inside of the cloth bag, and fold the edge into 1CM for sewing, thus completing the whole bag body.

4. Next, make the handle of the cloth bag, cut two pieces of cloth strips with a width of 6CM, scald the auxiliary cotton with a width of 4CM in the middle with glue, fold the cloth strips in half, fold the edges into 1cm, and sew. You can also find some beautiful lace cloth to decorate your lunch bag.