World's First Smart Cup Drinking Water Reminder Hydration Monitor Mug A smart water cup that works with your phone to record your water drinking habits and reminds you stay hydrated and healthy. Temperature senses and displays the relative temperature of your drinks with different colors. Made of Triton material, 100% BPA free.16-ounce capacity. Run on 2 CR2032 batteries for 180 days(batteries NOT included, need to buy 2 CR2032 batteries separately). Path to better health, great gift for everyone! Compatibility Information: Cuptime connects wirelessly via Bluetooth 4.0 with iOS and Android devices. Cuptime works best with iPhone  4s, 5, 5c, 5s and iOS6 or iOS7  or Android devices  Samsung Galaxy S4, Samsung NOTE 3, Samsung Galaxy SIII, Nexus 4, Nexus5. Including the updated versions of the models listed above.