I lost my retainer about three weeks ago when I slept over my friends' house. I brought the retainer with intention of wearing it to sleep, but I didn’t bring the case. I wore the retainer in my mouth. When we ate dinner I took the retainer out and put it in a napkin. Someone threw the napkin out after dinner thinking it was garbage. I searched the garbage for about 20 minutes then finally gave up. Long story short I’m not going to be putting my retainer in a napkin anymore.