3 "ARX Mk1 Film Guardians". Each holds 3 rolls of 35mm (without their plastic canisters). They all latch properly. They are supposed to protect film from radiation. I can't speak to how well they work, but I stored my Kryptonite in them and never had an issue.
$10 for the 3 of them, plus shipping. They can ship first class in US.
$10 for the 3 of them, plus shipping. They can ship first class in US.