Case of Homebrew

A Case of Homebrew is a package of five bottles of pledge gifts, and is the first hierarchical combining of the pledge items given out by various Ironforge NPCs during the Love is in the Air seasonal event.

All of the Love is in the Air pledge gift packages are non-functional as regards their name and picture. You cannot obtain a drink from a Case of Homebrew.

Source
If you have five or more bottles of Dwarven Homebrew in your inventory, right clicking on any of them will consume five and create a Case of Homebrew.

Ingredient
A Case of Homebrew is one of three Ironforge pledge gift packages which are the ingredients of the Ironforge Gift Collection.