Hey guys OP here. To answer some questions, yes I have told my grandmother various times that I have a retainer, and that it looks like packaging and to not throw it away. I do keep it in a plastic case but I only wear it at night so when I am out shopping for her or walking her animals she snoops in my stuff. I have tried keeping it in my room to keep away from her but the door always "accidentally" opens and her animals find it and play with it because animals like the saliva taste on the retainer, it is then she thinks it's packaging and throws it away.