3PCS Poster Tube for Blueprint Artwork, Art Document Tube Carrying Case Telescoping Storage Tube with Adjustable Carrying Strap for Drawing Drafting Map Scroll Expandable 17.5 to 28 Inch, Black

I've had a hard time finding poster containers. Office depot had huge ones in a 2 pack for 25. I found these and these are perfect. They extend for bigger posters.

I was originally looking for cardboard mailing tubes to store my board-game playmats when I came across these. Unless you're buying the mailing tubes in bulk, these aren't much more expensive, and while not exactly super-high quality (they'll crush under fairly light weight), they are a better-looking and more permanent solution. These hold two smaller playmats (~12"x24") rolled together, or some larger ones rolled tightly.

Baratos, prácticos y de bueno a calidad, En las papelerías comerciales cuestan el doble del precio

v good

Not sealed on end wouldn't protect paper documents in foul weather, not very sturdy either.