After experimenting with a mathematical model to avoid having to source expensive parts and finding himself at a deadend with that method, eventually a bi-directional load cell was placed inside ...

Italy’s Tintoria Stamperia Gorlese (TSG) upgraded existing machinery with sophisticated web tension load cells, increasing efficiency and reducing installation and tuning time by up to 50%.

The basic idea is simple: the cup holder contains a load cell that senses the weight of your drinking vessel. If the weight decreases, then a message is sent to your PC detailing the amount lost.