After searching for an easy and affordable way to sample craft brews from across the country, Moondog Growlers’ proprietors began selling specialty suds in bottles that customers can bring back and refill with a new selection each time. The growlers hold between two and four pints depending on their size, bestowing beers with a shelf life of 7–10 days unopened inside a fridge, or 24 to 36 hours opened. A rotating selection of 40 craft brews—which may include selections from famous hop houses such as SweetWater, Bell's Brewery, and Stone and local breweries such as Red Hare, Red Brick and Jekyll—changes based upon seasonal availability.