<p>I went to Walmart (in Canada) today to get a roll of 35mm film exposed onto a CD. The photos came out.. fine, but when I looked in the envelope I received I realized I'd been given the film back, but without the canister that it came in. I'm wondering if A) this is a standard practice, and B) if I need to buy some to store the film in - will it get damaged if kept in the envelope they gave me? If so, would a Black's or Henry's have single canisters for purchase? Thanks for the help!</p>