I'm a big fan of my ultra wide-angle Nikon 14-24, so I recently bought some FormattHitech 165x165 filters for it, along with the appropriate holder, which is a bit of a beast to get on. The 10 stop filter came in a decent lined wallet, but the 6 stop one just came in a plastic envelope that is difficult to use as the flap insists on wanting to shut!
I dropped the customer support department an email about this, and they replied (on a Bank Holiday) to say that they're in the process of changing their wallets and would be happy to send one out to me. It arrived today and is exactly what I was after.
Top marks to FormattHitech for this :-)