Just go to guest services when you first get to the park & tell them you want to upgrade your plan. They did it for me & the best part is they didn't get rid of my paper cup plan so I have the option of either bringing my tumbler, or if I want to go the paper cup route I leave it at home. Also when I go with friends I have an extra drink plan they get to use for free.Yeah, I already got the regular drink plan for 2023. Now having regrets. lol. I'll email them and see if anything can be done to upgrade our plans.