I always carry my bamboo utensils (its own purple carrying case) in my purse. Whenever I go to a faster food restaurant or do an event that use  plasticware, I pull out my own utensils.  After use, I just wipe off food with a napkin, put them back in the case and wash them off when I get home.

I received them as a Christmas gift, but I see similar available at HealthyPlanetShopping and Amazon for under $12.