| Briquette shape type | Level of interest | Total (%) | ||||
| Strongly agree | Agree | Neutral | Disagree | Strongly disagree | ||
| Stick | 48 (14.5) | 219 (66.4) | 51 (15.5) | 10 (3) | 2 (0.6) | 330 (100) |
| Pillow | 153 (46.4) | 91 (27.6) | 65 (19.7) | 18 (5.5) | 3 (0.9) | 330 (100) |
| Spherical | 173 (52.4) | 64 (19.4) | 77 (23.3) | 8 (2.4) | 8 (2.4) | 330 (100) |
| Honeycomb | 36 (10.9) | 77 (23.3) | 171 (51.8) | 38 (11.5) | 8 (2.4) | 330 (100) |
| Doughnut | 32 (9.7) | 92 (27.9) | 153 (46.4) | 50 (15.2) | 3 (0.9) | 330 (100) |
| Cylindrical | 45 (13.6) | 152 (46.1) | 97 (29.4) | 31 (9.4) | 5 (1.5) | 330 (100) |
| Hexagonal | 33 (10) | 206 (62.4) | 67 (20.3) | 19 (5.8) | 5 (1.5) | 330 (100) |