From the nih link > Drinking was recorded using a custom built end table that contained a digital scale beneath a ceramic tile insert in the tabletop (Ohaus mo

From the nih link > Drinking was recorded using a custom built end table that contained a digital scale beneath a ceramic tile insert in the tabletop (Ohaus model #B10P with I5S controller). Participants were instructed to always keep the beer glass on the table except when taking a sip. The scale was connected to a computer in an adjacent room that ran a customized program that sampled the scale at 5 Hz and detected any weight changes that exceeded 1 gm. This rapid sampling of the weight permitted a real time assessment of drinking topography that included gross measures of volume and number of beers consumed but also provided details on a more micro level and included the number and size of sips taken, latency to opening a beer, and consumption time of each beer. Additional details and photos of the device can be found in Lukas et al. (2005). Breath alcohol levels were assessed using an Alco-Sensor FST breathalyzer (Intoximeter, Inc., St. Louis, MO) both before and after the drinking session; values were not collected during the active alcohol acquisition period to avoid interacting with the participant and allowing natural drinking patterns to emerge. I would buy this product for my desk to measure water and coffee intact. Bonus points if it could detect the type of drink automatically based on some measured physical property. It might work well as a cup/bottle instead of a coaster.