Orange-Banana Smoothie Pops

Puree one Greek yogurt, thawed orange juice concentrate, bananas, lime zest, and fresh lime juice in a blender. Pour into six 3-ounce molds. (We used mini baking tins with Popsicle sticks, but you can also substitute paper cups.) Freeze until smoothie pops are solid, about 4 hours. To release pops, dip molds into hot water until pops loosen and slide out. If using cups, peel away paper.