Avoid bottles
Plastic savings calculator
How many bottles, how much plastic, how much money and CO2 you save per year if you switch.
The conversion uses average values: a 1.5-litre PET bottle weighs about 35 grams, single-use PET causes around 150 to 250 grams of CO2 per litre, tap water 0.3 grams, and a soda maker 20 to 40 grams. The derivation is in the article Life cycle assessment.
