Heck - I keep ordering airtights with rings in bulk just to get the thin foam sheets they use between layers!

I keep a box of "reusable" flips and pockets to use when shipping to others... and even use a cardboard back from a Tiny Treasures felt chip insert to block a drafty AC vent in my bedroom

I hope what "goes around - comes around". That although "supplies" came be a hefty additional expense, since others have to use them too... MAYBE it all works out in the long run.