Hidrate Spark TAP Smart Water Bottle – •Vacuum Insulated Stainless Steel •Straw Lid, 20 oz, Stainless •BPA-Free •Tap Phone to NFC Smart Tag to track water intake •LED Glow Reminder When You Need to Drink – Up to 12 reminders a day •Keeps drinks cold up to 24 hours •Customize: choose from 7 glow colors •Turn reminders off or snooze with the easy button interface •Tap your phone on the whenever you finish a bottle to sync •Free iOS & Android app, tracks hydration progress against your personal goal •Prevents sweating •Plastic lid has a carry loop Our Hydration Equation calculates your daily water goal using personal factors unique to you, like age, height, weight, sex, elevation, exercise and more, so you can experience optimum health through proper hydration