Fill a highball glass with ice cubes. Add apple juice and cranberry juice. Top up with ginger beer.
A tip from the bartender: If you aren't into drinking alcohol don't be afraid to order a nonalcoholic cocktail! Most bartenders we know like the challenge of making something special without alcohol. Like the Stay Sober, for instance -- a thirst-quenching, good-looking drink that feels just as festive as any other.