Cold brew generally has more caffeine and is less acidic, but which is better comes down to a matter of taste.
The sensation of drinking cold water may help you feel cooler as your heart rate comes down. Cold water may also make you feel temporarily more alert or calm if you're worked up.
The HydroJug Traveler has triple-wall insulation that keeps drinks hot or cold for up to 24 hours. “I use it [during] 12-hour nursing shifts and water stays cold the entire time,” one reviewer ...
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