You see a Wild box.
It weighs 9.99 oz.
Wild boxes can be looted from Wild Bosses.
These have a chance to drop many different items, most are common and not valuable, however it can drop extremely rare items, mounts and addons.
Upgrade Stone (Uncommon)
Stat Stone (Uncommon)
When used gives 50 energy.
Soul Soil (rare)
Five of them can be smelted into Archlight Key
Archlight Key (Very rare)
50% Experience boost (Very rare)