Put down your drink.
Next time you go to pick it up automatically to take another sip, notice as you pick it up, sip, and put it back down.
Next time you notice the automatic action happen, freeze at the point you notice, notice it feels, and put it back down.
How soon can you notice? How early in the process can you freeze and terminate the automatic action? Before I thought to write this, I first caught it after a sip, then just before my next sip, then when I first started to pick it up.