I found these containers at the Dollar Tree.
To make the popcorn you cut the top half of a marshmallow in fours. We used white marshmallows and then Jill painted yellow food coloring on them once they were on the cupcake. If you weren't going to make 50 like she did you could just buy the fruit flavored marshmallows and pick out the yellow ones.
Thanks Jill for letting me do the fun part of these cupcakes.