The ideal gift! Buy the best ready-to-drink online. Price and reviews available for Canteen Canteen Watermelon Vodka Soda Ready-to-drink – 6x 12oz Cans. Take a kiss of lime and refreshing watermelon and mix with some of the Earths purest bubbling water, and youd just hint at our uniquely non-citrus, powerfully refreshing, one and only Watermelon. Contains only 99 Calories and NO Sugars, Carbs, fat, or Sodium while being Gluten Free.