The KA-BAR Spork, which is made from food and water approved Grilamid, is equipped with a fork/spoon combo and has a 2.5" plastic serrated knife in the handle. The knife is accessed by pulling the spork in opposite directions from each extreme end. **Hint--avoid gripping the flat panel area in the middle of the Spork--this is actually part of its lock. The tighter you hold here, the more difficult it will be for you to pull out the knife!**
We use these on those....outings. You need one too. Heck, they are so inexpensive, buy your buddies one!
This eating utensil is also good in your luggage for you travel warriors as well. For those times the takeout delivery dude forgets your plastic ware in the delivery to the hotel. If ya been there, you know what I mean.