Missing items

At night after Pookie has gone to bed, I pick up the mess that Pookie has made.  I like to match items together to make sure nothing is missing.  Some items get audited multiple times a day.  Pookie has a Leapfrog Fridge Farm magnet set.  It's one of those things that sticks to the fridge and sings.  There are five animals, and for each animal there is a front and back piece.  Ten little pieces to go missing.  One day one made its way to the trash, which is why I am hypervigilant about making sure all pieces are accounted for.

Last night Pookie woke up and was letting all of us know that he wanted to be fed.  We went through our routine and I put him back to bed.  As I was putting the bottle in the sink, I realized that there were only 4 bottles, not 5.  It's almost midnight, and I am looking for the 5th bottle.  I checked in the office, I checked the kitchen.  I went through the living room.  This included my decision to empty Pookie's toy box and sort through all of his toys.  As well as checking under all of the furniture and random places that a bottle could be tucked away.  All to no avail.

Then I had a thought.  What if the bottle is in the trash?  I started digging through, and wouldn't you know it, there it was.  It was half way down in the trash can.  Eww!  Luckily, the garbage wasn't very disgusting.  The question remains, how did it get there?  Did Pookie decided he was all done and toss his bottle away?  Or was I completely absent minded and accidently pitched it?  Considering I haven't gotten enough sleep in way too long, there is quite the possibility that I threw it away.  Which leads me to the thought of, what else have I mistakenly thrown out?  I think that I need to work on getting more sleep and being more careful about what gets thrown out!