Hi Glendo! Welcome to planDisney! Thanks so much for stopping by to ask us this great question.
It sounds like you have been doing your homework about
items that are not permitted at the Disneyland Resort. When referencing the list, what stands out to me is "Coolers larger than 6-pack sized are not permitted into the theme parks." I recommend following this guidance first, in addition to the dimensions. Even though two of the three dimensions appear to fall within those allowed, I would hate for you to be told you couldn't enter with it.
As you're planning what to bring, be sure to have an appetite for the yummy eats and treats you could get inside the theme parks. You can find out more about what to eat in the
Disney Eats: Foodie Guide to Halloween at Disneyland Resort 2023. If you plan to visit
Disney California Adventure Park, don't miss the newest addition to the park,
San Fransokyo Square!
I'm wishing you a magical visit filled with fun, food, and special memories! Please stop by
planDisney again in the future. We would love to help!
See ya real soon!
Smiles,
Lisa