Should drink Hot or Cold water for weigh-loss?

Drinking cold water has a very slight advantage over drinking hot or water at room temperature

When you drink ice-cold water, you body spends energy to heat the water up so it is at the nominal internal  temperature. It will use up 8 calories to warm one cup of water. Expenditure of 3,500 calories result in loss of one pound, or about 435 cups of ice-cold water can reduce your weight by one pound. That's a lot water. Too much cold water can decrease functionality of the gastrointestinal tract.

Cold water is easier to absorb than warm water.

It is harder to drink cold water than hot water.

Drinking water at room temperature has the least shocking effect on the system

In summary, it does not really matter what temperature is the water you are drinking, it is the actual amount of water you are drinking for efficient function of your kidneys.