> 2-3 liters (more in hot conditions) for comsuption.
> 0.5 liter to brush your teeth.
> 2-3 liters for cooking and washing food.

I have measured my consumption at about 1l per day. I reckon 2l would include cooking. (For example, a portion of rice takes me 300ml.) Brushing my teeth can be done in 100ml each time.