I tried really hard to find it last year. I thought the same thing, that it would be a good way to hold other strips. But I had a really hard time finding it! I think the problem was that it had just been released and was not widely available yet.
But I have been going with this all the time. Whenever I leave the house, it’s what I take. It is such a compact and simple design (both lancet and strips), and very small and easy to carry that I haven’t been looking for anything else since I started using it.
If you come across a Guide vial, please share your opinion!