I thought I could use these to ship collectible blu-rays and DVDS, but no go. These are flimsy envelopes and the bubble interior peels up with even the slightest pressure, offering very little protection to the objects inside. I'd think twice about using them without reinforcing it with cardboard. The seller I got them from was one of many on the list (we're not supposed to specify), though I'm pretty sure all of them sell the same product.