I was measuring ingredients for a cake in my apartment when I dropped my blue plastic 1/2 C measuring cup. I heard it go tok as it hit the ground once and then no other sound afterwards. I immediately looked all around for it but it had vanished.
By the end of my search I had removed all the drawers, moved the appliances, and checked inside/under/behind everything in the kitchen and surrounding areas. I've moved 3 times since then and never found it.
I hope the eldritch horrors the next plane over are enjoying my half-cup :/