It is now illegal to sell unlimited soft drinks at a fixed price or offer them unlimited for free.
The number of overweight or obese people in France is below the EU average but is on the rise.
The World Health Organization (WHO) recommends taxing sugary drinks, linking them to obesity and diabetes.
Self-service "soda fountains" have long been a feature of family restaurants and cafes in some countries like the UK, where a soft drinks tax will be introduced next year.
