DAddario Woodwinds Reed Guard large blue

I've used closed reed cases with slots for moisturiser sachets until recently but have come to realise they can encourage black mould spots on cane reeds. Not a good thing ! I admit it has taken a long time for the penny to drop - but here in Ireland (and I suspect much of NW Europe reeds drying out is not really a problem - RH here rarely falls much below 70% and is frequently over 80%. So these open cases are just fine. They would be 5 star perfect if they were made of wood or recycled plastic.