There is a hindu practice of only drinking room Tempature water. The theory is your body doesn't need energy to warm it up inside you
Me I love ice cold water all year around
i think for every say 20 ounces of warm water you can drink your body doesnt have to expell 50 calories to digest it
further more that 20 ounces of warm water will keep you from needing 400 calories for energy furthermore 20 ounces extra of water will give you more energy to burn around 300-500 more calories if you were to go lift