I've tried using duck and air/moisture proofing tapes on a tin (even put in a desiccant) and it did the job fine. The only drawback, and this is just me, is that I'm always going into it (using, updating, adding things) and just didn't like dealing with the tape. However, I'm considering trying tape out again on a Trangia (aluminum) mess tin - the one with handles that could be substituted for a large plastic container - plus you can cook with it.