I agree that the souvenir cups are a good "memory keeper". We store previous year cups in our camper, they are great for keeping the bugs out of drinks, and easy to carry on hikes. And last year after my 17 year old left a souvenir cup in the car for a couple of days, we just attached the straw from a previous year due to the mildew buildup (Yuck!!) This ultimately made it really easy to identify our cups from others in the bins at the rides. However, the paper cups eliminate the fear of the teenagers losing the cups at KI, costing me another $30. Ugh, I've got some thinking to do, maybe I'll just fork out the extra $$ to add to their passes.