I am also constantly looking but never buying boxes :person_facepalming:
This thread Nice little watertight (battery) storage case from Walmart reviews the Walmart boxes.
I do own and use these. I really don’t recommend for backpacking as they are not waterproof. They do work, you would need three, not a big deal as they are cheap. I use them in “dry” places.
There have been reviews of this case Storage Case , on the BLF but I don’t a lot of time to search for the review(s).
I have had my eye on it but never decided to buy. I like the price - cheap.