Thermoscan lens filter container

So you have a wonderful Braun Thermoscan to measure temperature of your children and you are reusing lens filters (on a personal basis) to not waste money buying hundreds of filters. Ok, mee to :) But where to store lens filters, when not in position on the thermometer?
Here is a perfect solution that is working great for me! Put the lens filter into this container, that was shaped to fit exactly the filter, and close the cap! No more lens filter crushed (they are so easy to crush...) and no di