You may like the romantic idea of keeping your drinks cool by dangling the bottles in a nearby stream, but for a modern alternative try an insulated jacket like the Vacu Vin Rapid Ice (available from www.wineenthusiast.com).
You keep the jacket in the freezer and simply pop it over the bottle once you take it out of the fridge. You can find them in larger supermarkets and most high-street wine shops. Or chill the bottles well and put them in their own insulated bag.
Images Courtesy of www.flickr.com