Fresh Brewfest Hops

Fresh Brewfest Hops provides a buff which converts your mount into the Brewfest mount associated with your faction. Duration: 1 hour.

Source
Fresh Brewfest Hops is purchased from the Brewfest Token vendors for a cost of. These are only available during Brewfest, the Brewfest Tokens required to purchase them disappear when Brewfest ends.

Use
Using a Fresh Brewfest Hops puts a buff on your character which converts your mount into a Swift Brewfest Ram for Alliance characters or Great Brewfest Kodo for Horde characters. The buff is on you, not on the mount; if you switch mounts, the buff is still active. The duration of the buff is one hour.

Achievement
Use of this item satisfies the achievement if you have riding training. You do not have to have a mount, nor use a mount, nor have a mount actually converted; the achievement procs as soon as you use the hops. This item is the cheapest way to easily proc this achievement.