This brings back memories of winter at Kent State University when I was seventeen. Those of us that lived on the upper floors of the dormitories and didn't have refrigerators would set our beers on the outside windowsills to keep them cold. The problem was that some students were very adept at knocking the beers off the sills with snowballs, so I always kept mine on a tether.
None of your sentences is incorrect, but I prefer
4: The drinks are as cold as if they had been refrigerated.
PS: Where's your city?