Gus,
Those pouches are pretty much in the same category as the helmet, that is, emergency substitute. And like the helmet, once the emergency (shortages of 1915) was over, so was the short lifespan of these pouches. As you can see, they did not hold up well. They were made from riveted pressed paperboard. You have probably seen the material before, as it was used to make carrying cases for many things. I have one such goggles case that looks like a single section from a M09 cartidge pouch. The gas goggles were carried in that pouch on the belt and used in conjunction with the special drivers gas mask.
I have seen and have pictures of other ammo pouches in various styles which were made from this material.
Chip