Here is a versatile tool that replaces a spoon, fork, and knife, allowing you to eat outside without having to carry your regular utensils. The Ka-Bar Tactical Spork has a serrated knife that measures 2.5 inches long. You can access it by separating the handle.
This tactical spork is 6.875″ long. It weighs only 0.1lb. Costs under $8 at this time.