Still wondering how much water you should be drinking in a day? Well wonder no more. The HydraCoach Water Bottle ($29) is an intelligent, interactive bottle that calculates your daily water consumption needs. This water bottle provides proper pacing throughout the day to achieve optimal hydration and tracks your fluid consumption sip by sip. The HydraCoach measures the total amount consumed, average hourly and daily consumption, percent of daily goal and total sips.