Small Pouch of Coins

Small Pouch of Coins contains a monetary reward for crafters in exchange for their respective token: Secret of Draenor Alchemy, Secret of Draenor Tailoring, Secret of Draenor Blacksmithing, Secret of Draenor Leatherworking, Secret of Draenor Jewelcrafting or Secret of Draenor Engineering.

Source
This item is sold by the tradeskill vendors at Lunarfall / Frostwall (requires the respective tradeskill building), and Stormshield / Warspear in Ashran.