I was on the Spirit in a Cat 8I . There was a locked refrigerator that the cabin steward will open for you as soon as you can contact him.
It was stocked with small bottles of wine, liquor, coke, sprite, ginger ale, pretzels, cashews, pringles... candy bars- snack items. There was a charge for them and when consumed, replaced quickly.
I can't remember the exact charge for the items, but to me they didn't seem any more expensive than if you had picked them up in a convenience store. The little liquor/wine bottles averaged about $4.00 each.
I needed room in the refrigerator for medication and needed it unlocked right away. There was no problem at all. We paged the cabin steward as soon as we got to the room and he was promptly there with the key.
I moved some things out to make room for my meds and left them on the counter so he could see they were there, just not consumed.
You can move all the items out if you wish and leave them on the counter above and put whatever you wish into it. We also brought along bottled water and kept it cold in there.
Have a great cruise!