Water Tracking Through Tapping The free HidrateSpark App recommends a daily personalized hydration goal tracks a full bottle when you tap your phone to the Tap to Track smart tag to show your progress available on Android and iOS NFC Smart Tag syncs to the HidrateSpark App and records your hydration after drinking a full bottle of water Glows remind you to drink 12 times throughout the day and can be customized by color Button interface to turn reminder glows on change color and snooze the next reminder glow Made with BPAfree lightweight shatter and odor resistant Tritan plastic