...even after dropping them on the dusty floor a couple of times, they still hold. You can take them away, put them back in the container, or stick them on your shells for less "professional" temporal storage in case you don't need them.
Remo Ambassador + these = muted sound if you need it, for example. No need to use these on 2-ply heads necessarily, although they dampen Evans Black Chrome 2-ply heads too, for example.
Also, don't be afraid to pull them hard to get them out of the container the first time - they bend and bend and bend, but do not break.