I e-mailed Disney to ask about the "loose ice" vs ice contained in a ziploc bag. I got a response today. I'll share it with you:
Chris Drake (Disney)
Apr 6, 7:27 AM EDT
Dear Patty,
Thank you for contacting us regarding updates to our prohibited items policy at the Walt Disney World Resort.
Our Disney Parks Blog recently shared more details on our Resort's rule updates, available
HERE, which I recommend reviewing if you have not had a chance to do so already. I These rule updates are intended to provide a more enjoyable experience for everyone who visits by, among other things, easing Guest flow and reducing congestion. I do appreciate and understand how these changes may impact your experience within our Theme Parks.
Please know that you are still permitted to bring in ice in resealable bags, such as Ziploc bags. However, bags of ice that you purchase from stores will not be permitted. This policy update is now in effect across all Theme Parks at the Walt Disney World Resort.
Patty, I hope this information finds you well.
Chris Drake
Guest Experience Services
Walt Disney World Resort
I plan to print this out and have available if security tells us ice in baggies is prohibited.