1. First, draw the outline of the bag with a brown brush. Be careful not to draw the line too straight, but bend it slightly, as shown in the figure.

2. Step 2: Fill the color with green pigment and draw a layered feeling, as shown in the figure;

3. Step 3, draw the shape of the snack bag label in brown, as shown in the figure, or design other graphics yourself;

4. Step 4, draw a simple snack shape on the snack bag label with a brown brush and color it to make it more realistic, as shown in the figure;

5. Step 5, add a shadow to the bag with dark green, which has a three-dimensional effect, as shown in the figure;

Step 6. Finally, draw the highlights of the bottle with a white brush to enrich the layering. As shown in the figure, the snack packaging bag is completed.