Filed under: HouseholdBelieve it or not, engineering minds have figured out a way to gadgetize even coasters, but Sentilla's Smart Drink Coasters hope to be the zaniest yet. Designed using vanilla glass coasters from Michael's (an arts and crafts store), one of Sentilla's diminutive pervasive computers, a handful of LEDs and a few other ingredients, these units can not only blink in different ways depending on how full / empty one's beverage is, but they can be used to create a whole new world of drinking games. Reportedly, the gizmos can be programmed to understand when a drink is on it and when a refill is n