I feed Bastain in one of those little 'critter keepers', and Atreyu in a rubbermaid. I was noticing the other day how Bastian knows that container...as soon as I put him in it...he starts searching, and striking at any movement. And I wondered how he is going to react when I feed him in something different, cuz he is rapidly outgrowing the critter keeper...maybe next feed I'll try it in the rubbermaid I feed Atreyu in...see what happens.