If you are in the middle of drinking a soda or eating the last of a food item, right clicking and selecting "Eat" or "Drink" on another item in the inventory will cause the current item you are eating to stay in your inventory as a 0% can/food item once the animation finishes. You then have to drop it onto the ground, creating useless item clutter. If you do not, the used up item will simply disappear (which I'm assuming is supposed to happen).

This could potentially cause unnecessary item clutter and could potentially impact performance if you have enough impatient eaters.