| Features | Type 1 | Type 2 | Type 3 | Type 4 | Type 5 |
| Elements | |||||
| Shape of bottle cap (X1) | Square (X11) | Sphere (X12) | Trapezoid (X13) | Inverse trapezoid (X14) |
|
| Material of bottle cap (X2) | Glass (X21) | Plastic (X22) |
|
|
|
| Surface of bottle cap (X3) | Transparent effect(X31) | Semiopaque effect (X32) | Plating effect (X33) | Facet effect (X34) |
|
| Width-to-height proportion of bottle cap shape (X4) | 2:1 (X41) | 1:1 (X42) | 1:0.67 (X43) | 1:0.5 (X44) |
|
| Shape of bottle body (X5) | Square (X51) | Circle (X52) | Trapezoid (X53) | Inverse trapezoid (X54) | Hexagon (X55) |
| Surface of bottle body (X6) | Transparent effect (X61) | Semiopaque effect (X62) | Facet effect (X63) |
|
|
| Width-to-height proportion of bottle body shape (X7) | 2:1 (X71) | 1:1 (X72) | 1:0.67 (X73) | 1:0.5 (X74) |
|
| Proportion of cap shape height to body shape height (X8) | 3:1 (X81) | 1:2 (X82) | 1:1 (X83) |
|
|