Cans filled and seamed upon customer request, such as Crowler® cans, are a relatively new type of take-home draught beer package that has recently become very popular. These aluminum packages are typically large volume, up to 32 ounces, and are filled with draught beer and sealed directly after by the bartender or server. This document seeks to demonstrate some of the advantages this type of packaging has for breweries and draught beer retailers, limitations it puts on draught beer quality, and best practices breweries and retailers can employ to maximize beer quality.