They have the curved dishes for worms which work fairly well, but I don't know about containing crickets. I've found it easiest to offer them a few at a time in small batches so they're easier to track (and pick up after meal time). Some people also stick them in the refrigerator for a little bit before meal time to slow them down. I don't advise leaving a bowl of crickets unattended in the tank though, since they are likely to escape and hide. In numbers they can do harm to a dragon via bites, especially while a dragon is sleeping.