The OakStump Farm Yellowjacket Trap safely and efficiently catches yellowjackets and other wasps by baiting and capturing them in a transparent jar. This trap is more effective because it lets a few insects escape and return to the nest - they then revisit to the trap, bringing more wasps with them right into the trap! OakStump Farm Yellowjacket Traps are reusable, non-toxic and safe for the environment. CASE OF 12.