Not so useful as I thought

View the price and longevity of in-ear headphones, I thought this would be very useful ...
At the reception: surprise, there is not a case, but two!
I imagined a plastic a little more flexible, but the product is particularly robust. The headphones are easy to position on the inside, but we must do many laps because the winding diameter is small and it's a bit long to do. To exit the earphones of their case, the procedure is accelerated by a yo-yo effect. The thing is that my flat cable tends to keep a spiral shape, so for me the result is rather mixed for the moment.
In any case it is a well thought out solution that will be to some.