I purchase sodium sulfite in bulk and lately it comes in plastic bags (!) . I immediately transfer all of the sufite to mason jars for storage. I re-use the jars that the spaghetti sauce comes in. This seems a perfect solution. Glass does not "breath".

Oh, I also use real glass beakers when processing film...just seems natural. Yes, I have broken one and yea, it made a mess...no biggie. Can't let little stuff like that change your life.