| Evaluation stages of drinking water | Choices | Amount of CO2 emission [g-CO2e] (drinking water x consumed mL)） |
| Production and distribution of drinking water | Tap water supply | 0.000288x |
| Domestic 500 mL plastic bottle | 0.261x | |
| Imported 500 mL plastic bottle | 0.484x | |
| Domestic 2000 mL plastic bottle | 0.176x | |
| Imported 1500 mL plastic bottle | 0.410x | |
| Water quality improvement treatment | No treatment | 0 |
| Boiled | 0.128x | |
| Filtered water | 0.000683x | |
| Chilled water | 0.0154x | |
| Sale of drinking water | Sold at room temperature | 0.0435x |
| Sold in a refrigerator | 0.164x | |
| Sold in a vending machine | 0.254x | |
| Storage of drinking water | Not stored in a refrigerator | 0 |
| Stored in a refrigerator | 0.0350x | |
| Utilization of drinking containers | No container | 0.000515x |
| Glass | 4.08 | |
| Water flask | 12.2 | |
| Plastic bottle | 0 | |
| Disposal of plastic bottles | No purchase or use | 0 |
| Multiple-use | 1.80 | |
| Burnable waste disposal | Domestic 500 mL: 0.167x Imported 500 mL: 0.138x Domestic 2000 mL: 0.0865x Imported 1500 mL: 0.0632x | |
| Sorted disposal | Domestic 500 mL: −0.0376x Imported 500 mL: −0.0303x Domestic 2000 mL: −0.0177x Imported 1500 mL: −0.0120x |