3. Contrast and harmony of space
Every entity needs a spatial location, and this kind of space is called real space in shape. There is also a virtual space in the shape, which refers to the space formed by some additional parts of the shape itself, such as the handle of the pot, the handle of the cup, the ear of the bottle, etc.
Space contrast refers to the contrast between virtual and real space. For shapes with additional components, more attention should be paid to the control of virtual and real space. When designing the container, it is necessary to consider the ratio and contrast between the real space and the virtual space, and not overwhelm the guest.

4. The contrast and harmony of texture
Texture can be divided into visual and tactile. The artistic appeal of packaging container modeling is conveyed to our sensory system through the natural attributes of materials such as light, color and shape. Different objects have different textures. The contrasts are: light and hair, light and dark, transparent and opaque, thick and thin, soft and hard, etc.
The ceramic, glass, metal, plastic and other materials in the shape of the packaging container each have a different texture. The same material, through different processes, printing, grinding, polishing, glazing, stamping, car engraving, corrosion, sandblasting, etc., can form a kaleidoscopic texture.
The use of new materials can strongly reflect a modern decorative effect in design. For example, in the main body of the glass shape, partial use of metal, wood or plastic, etc., will produce a contrasting beauty of materials.

5. Color contrast and harmony
In modern design, the high-quality use of materials has become an important part, and the use of material colors has a great relationship with the rationality and artistry of container design.