Eating it is better than tossing it. However, I would give it away. I'm sure you could find someone to give it to, if you don't want to eat it. When I became vegan, I gave all my opened and unopened non veg*n food to the homeless man who lived by my apartment. He was stoked. A while back, I accidentally bought a granola bar with honey. I ate half of it before I realized it wasn't vegan. The kid who sat next to me in English class was thrilled to eat the rest. People like free food.