Can't you just put it on your calendar? Or use a sticky note? Bonus: a sticky note doesn't need a battery. Alternatively, your coworkers are adults, and can sim

Can't you just put it on your calendar? Or use a sticky note? Bonus: a sticky note doesn't need a battery. Alternatively, your coworkers are adults, and can simply wait an hour for you to eat lunch. They won't go into hysterics if they can't find you.