You are then going to take a piece of special tape or thick white gaffers tape and place it on the film canister in a place that can be seen easily at the lab. You will put the number of the film roll that is in the canister, the number of the mag it was in, how much total footage is in there in feet of film, and how much of that footage is exposed in feet of film. Below that you will list the production information directly on the can. This will include the name of the production, the date it was shot, the type of film stock it is, what assistant camera person loaded it, who the director or producer is, and any company information that is relevant. The information on the tape is going to be unique to that roll, but the production information that you add to the lid will be common to all the canisters of exposed film stock that you send in for development and processing. Make sure that all information labeled on the canisters is the same as any in the shot list or letters sent to the lab. Try to secure the entire canister in another bag or carrying device so that any of the tap or shot lists attached to not get removed from the lid during transfer.