Umbrella Coffee Cup Holder

So the usual walk to work/school is dragging my trolley bag with one hand while carrying coffee in the other. The problem is when it is raining. I need another hand to hold my umbrella up. If its not windy you can almost get away with holding the umbrella and coffee cup in the one hand (and I say almost, even with a Keep Cup you can still manage to spill some)

So Problem solved, attach the coffee cup to the umbrella rod and presto.