First of all, our beverage cooler MADE and kept our things quite cold! All I'd read on here was that the cooler did not make things cold, and we ended up getting "scolded" for having our wine too cold!
We brought two bottles of red wine (unchilled) and for lack of a better place to put them, put them in the cool box. When we went to dinner at Palo (the first night after being on board about seven hours) we handed our nice bottle of Amerone to the matra'de and he looked at us like we were ignorant and said "this is chilled...I let it come down to room temperature for a while" and walked away with it!
So the next time we took wine to dinner, we took it out that morning so it would have the day to "come down".
Maybe some cool boxes work better than others!