Water boffins inform me that 8 glasses of water a day is what you should be aiming for the truth is though who has really has time to keep track of that oh the bluetooth smart cup seems to have plenty of time on his hand compatible with any smartphone that has access to the app or google store the bluetooth smart cup makes its living by syncing your phone with the accompanying cup and keeping track of your daily intake and hydration levels on its all to handy application far from just rel