System and device for non-invasive drink detection

A system comprising:

• a wearable device including:
• at least one motion sensor operable to detect one or more motion signals, wherein one or more biological sensors includes a heart rate sensor, and one or more biological indicators includes a heart rate and/or a heart rate variation;
• a processor coupled to the at least one motion sensor;
• the one or more biological sensors coupled to the processor and operable to detect the one or more biological indicators of a use, wherein the one or more biological indicators includes a surge in the heart rate;
• and
• a mobile device communicatively coupled with the wearable device, the mobile device including a memory configured to store instructions executable by the processor, the instructions, when executed, are operable to:
• obtain, from the wearable device, of the one or more motion signals;
• obtain, from the wearable device, of the one or more biological indicators of the user;
• correlate the or more biological indicators of the user with the one or more motion signals;
• determine that a drink event is detected based on the correlation between the one or more motion signals and the one or more biological indicators,
• wherein the drink event ends upon a return, based on the one or more motion signals, to a position prior to the drink event being detected;
• and
• estimate a volume of the drink event using an area under a curve of the surge in the heart rate over a baseline heart rate.