Electronic drink coaster

1. An electronic drink coaster, comprising a coaster containing a weight detector for sensing a weight or weight change of a container with drinking fluid on the coaster, and further comprising a processor for processing signals from the weight detector, and a communications port for wirelessly relaying information relating to the drinking fluid on the coaster, wherein a bar or restaurant is notified to provide a new drink when the drinking fluid is consumed.

2. The coaster of claim 1 , further comprising one or more buttons selectable by a user for ordering a drink from the bar or restaurant and from the coaster.

3. The coaster of claim 1 , the weight detector comprising a force sensor, the processor configurcd to determine a change in the force to determine weight.

4. The coaster of claim 1 , the weight detector comprising one of a force sensing resistor, electro-resistive device, an accelerometer, and a pressure sensor.

5. A system for ordering drink refills, comprising a drink coaster having a drink coaster body with:

a weight detector for sensing weight of a beverage container on the drink coaster body;

a processor for processing information from the weight detector to determine whether a user of the drink coaster needs a refill;

a wireless transmitter; and

at least one button, the processor responsive to user inputs and the information from the weight detector to activate the wireless transmitter to transmit wireless signals indicative of a desired order or a need for a refill.

6. The system of claim 5 , the desired order comprising a beverage order.

7. The system of claim 5 , further comprising an LED capable of emitting light to indicate a status of the order.

8. The system of claim 5 , further comprising a receiver configured with a food or drinking establishment that supplies the order, for receiving the wireless signals.

9. The system of claim 5 , the processor processing the information to determine whether the container is empty.

10. The system of claim 5 , the processor processing the information to determine whether the container is full.

11. The coaster of claim 5 , the weight detector comprising a force sensor, the processor configured to determine a change in the force to determine weight.

12. The coaster of claim 5 , the weight detector comprising one of a force sensing resistor, electro-resistive device, an accelerometer, and a pressure sensor.

13. A method for ordering drinks, comprising:

automatically determining that container for fluid needs refill based upon a weight of the container on a drink coaster; and

automatically transmitting a wireless signal indicative of a need for refill, from the drink coaster to a wireless receiver in a restaurant or bar, which may then refill the fluid.

14. A method of claim 13 , further comprising responding to user input via at least one button on the coaster to wirelessly transmit a food or drink order to the wireless receiver in the restaurant or bar, which may then fill the order.

15. In a drink coaster, the improvement comprising:

a wireless transmitter for generating electromagnetic energy indicative of an order of food and/or drink;

a sensor for detecting weight or change of weight of a drink on the drink coaster; and

a processor for processing data from the sensor and for instructing the wireless transmitter to generate the electromagnetic energy in response to the weight or change of weight.

16. In a drink coaster of claim 15 , the further improvement comprising a user interface at which a user of the drink coaster can operate to order food and/or drinks, the wireless transmitter responsive to the user interface.

17. In a drink coaster of claim 16 , the further improvement wherein the user interface comprises a button at a surface of the drink coaster.