I'm not a believer that a person should definitely consume 2 litres of water every day. I might sound weird but I do not drink water at all. I drink a small quantity after my food to just wash my mouth. Other than that I never keep any targets for me to drink these many litres every day.
I'm a firm believer who thinks that we should be consuming food and water only when it is required for our body. I'm someone who practices this ideology. I drink water only when it is necessary for me and only when I feel thirsty and feel like drinking water. I have been like this for many years and have had no problems.
I'm not sure if this ideology is correct or wrong but this is just only for me. I feel it works for my body condition so I'm practising it. I have seen people drinking over 6 litres of water every day. I'm not quite sure if it is good for health or not. Every human body takes water in the form of moisture during our breathing. I somehow feel that it is sufficient for my body and if at times when I need more water, I will feel thirsty and that is when I drink water.
I will never force my body with water when it is not required for me. You can also check online for references on the harmful effect of drinking lots of water. Especially during the summer season, my body will require lots of water. That is when I will really feel thirsty and drink more water. Or when I do some really brisk things like walking or playing outdoors, I will need more water. I will feel thirsty and I drink lots of water.
During winter and rainy season, I don't drink water at all. Might sound strange but that's what I have been doing for several years.