The Drink More Reminder Coaster features LEDs and a chime to get your attention when its time to hydrate. Using a pressure sensitive switch, the reminder coaster will begin its 20 minute countdown once a cup has been placed on top. After the 20 minutes, the LED will flash 3 times, the chime will ring and the LED will stay on. If the pressure switch is still down after 15 seconds, another chime will ring and after a total of 30 seconds later, the LED will turn off.