If you are talking about what is in your resort room, It is a refridgerator full of sodas and wines and water and other bottled drinks. there is sometimes candy and chips available too.
I think they are only in the deluxe resorts. We were in the YCR when we had ours.
If you use anything, the maid will replace it the next day and it will be charged to youre bill. It is very expensive so I would suggest you bring your own drinks and snacks. You can always fit a few of your own bottles in the fridge. Even with everything they have in there.