Spitfire feather pouch. RUMMAGE is the only verb that works with this pouch but RUMMAGE only works if the pouch is held in hand, so making fletchings from the feathers inside looks like this: rem pouch, rummage pouch, wear pouch, get razor, cut feather, stow razor, stow fletching, rem pouch, repeat...
I assume these pouches were intended to be worn during use.