Link to December 23 Restaurants & Institutions article, "Technology Drives Savings Behind the Bar".
Excerpt: The RFID spouts, equipped with wireless transmitters that send pour data to a central computer, can track liquor use by the bottle, drink, bartender, shift or just about any other metric. The system integrates with the restaurant’s point-of-sale (POS) system to determine the types of drinks ordered and their ingredients. If the amount of inventory used varies from what is expected, the system calls out the discrepancy.
Not a capability likely to be found in a library's RFID RFI.