Lost and found

Like many other people, when I have been shopping I put things away in a place where I know I can find them when I need them. Obviously groceries are kept in the kitchen cupboards and cleaning products either under the kitchen sink or under the stairs. But it's the things that are not used frequently that sometimes cause a problem.
Now usually I am a very organised person, but note that I said 'usually'. For instance, all guarantees for any item that I have bought, together with instruction manuals, are kept in a top drawer in the kitchen and they are sorted every once in a while so that they are mostly up to date. Spare batteries are all kept in a cupboard in the front room, there is a tool box containing a small hammer, screw drivers etc. under the kitchen sink where I also keep a few screws, the odd picture hook and so on.
This morning I went looking for a new toothbrush head for my electric toothbrush and I always keep these with a few spare toiletries in one of the top cupboards of the wardrobe but they weren't there. I knew I had bought some a few months ago and I also knew that I hadn't used them so I took everything out of the cupboard but there was no trace. Then I checked the other cupboards and places where I keep my 'spares' but still no sign. I checked all the drawers and anywhere else where any normal person might put spare toothbrush heads but there was no sign anywhere.
In the end, I gave up looking and as I was going shopping anyway, I put them on the list thinking that the others would turn up one day, probably somewhere that I wouldn't expect to find them.
Before going out, I went to check the light bulbs which I keep under the stairs because I had used one some time ago and had not replaced it and needed to make sure that I have enough spares. Guess what I found in the basket where I keep the bulbs....the toothbrush heads!
I will be very careful next time I put my shopping away.