Bittereinder Craft Beer by Igmari Naude, via Behance I like this concept because it is different from any other container for this product. Also i this this style of packaging would cut down the amount of paper used to design it.
The TapIt Cap screws onto a growler and prevents beer from going flat after the bottle is opened. To fill a glass, a user injects carbon dioxide from an attached canister and releases the spigot. A pressure-release valve keeps the growler from bursting.