Only thing I've found with using plastic leader storage, some worm brands will melt the [censored] out of other plastic. I believe its the Kramer worms. I left a kramer worm jig in my jig box and it melt the case, the foam, and the other mad river worm jig i had. Also, as stupid as it may be.... I left a kramer worm on the dash of my car, yep..... melt the dash. They leave a deep imprint and literally melt things away. Not sure what they put in those things but look out.