Bought this case/guard with the intention of rotating between different reeds.
I learned later on that there are also cases that trap some moisture inside. I imagine those are more useful than this item. This guard also grips the reeds at their playing end, with rubber 'teeth', potentially causing more waviness in the reed edge. In the end, I prefer using synthetic reeds and just storing them in the case they came in.
In conclusion, this is an okay case for people just wishing to keep their reeds together. Otherwise, the features are very limited.