Stone Grill/Wopper can copy any items

[SeaLoong]

prepare a container which can save its items/fluid when broken, and some same container with nothing

put the first container in Stone Grill/Wopper
put the rest container in Stone Grill/Wopper at same place, however, it should be NOT happened! because the rest container is empty
in fact, it happened, then get back the stack container. they are all "the first container"