Silly question of the day!

I hadn’t ordered Starbucks in a while, but went back to it recently as I love the cold brew and I’m ecstatic there’s a nondairy option.

My question is about these four dots as I see this is a new implication to the cup. Is this so it’s easier for employees to grab the next cup out of a stack/so the cups do not stick together? Just a curious question as if so, this seems like an easier thing they implemented for employees!