This is too hilarious.
I agree that there are now a lot of Olsen-wannabees who have adopted a Starbucks cup as an accessory. But this is perhaps putting the cart before the horse, as there were a lot of people walking around with Starbucks cups before the Olsens entered high school.
For that matter, there is a Coffee Underground

that has been walking around carrying cups of hot coffee (without spilling it, usually) for many years before Starbucks existed. Some of us even skateboarded to our college classes carrying our coffee (usually without spilling.)
Uphill in both directions. In the snow.