Something a little larger than a cup would be better, maybe even a deep tupperware container and also a few pieces of cut up egg carton for them to "nest" on, which also make it easier to extract them from the container at feeding times.
Depending on the amount of crickets you have, I'd say it's best to keep them in a tupperware or rubbermaid bin. Make sure you have ventilation too or it'll get stinky!