I carried them around in whatever day bag I was carrying at the time. They were transferred back and forth, carried on numerous hikes and camping trips and even in my pockets at times (which can be very rough on such a package). They received no special protection, but neither did I try to deliberately test their strength or durability.

With my normal pocket EDC, the pocket was the most abuse they received. All of the packages worked in the end, kudos Phaedrus.