The final interaction scenario is as follows:

Person A is sitting at home, taking a drink using a cup with a Clink! handle. Their LED light turns on which means that their friend, Person B, is also taking a drink at the same time. Person A decides that they want to do a cheers, so they tap their glass on the table (their LED starts slowly pulsing) and wait. Person B's solenoid taps on their glass. That lets them know Person A wants to clink. 

But, first, they have to let Person A know they're ready. So Person B taps their glass on the table. Person A's solenoid taps on their glass, and now both Person A's and Person B's LED is strobe-lighting. This means it's time to clink!

Person A raises their glass and Person B raises their glass, and CLINK! The solenoids on their glass make one resounding clink, and everything resets back to normal.

-----

To help visualize this better, we made the following video: (BELOW).