Some companies make tobacco tins made out of real aluminum but can be quite pricey. I've recently had great luck using a little snus tin as my on the go tobacco storage. I used to use a pipe pouch but just found it to be awkward to carry and would dry out my tobacco in hours. The snus can is a bit smaller and therefore holds less tobacco but found it keeps it fresh an moist (not airtight but air tight enough) and is a much smaller profile, fits right in the pocket. Just a little PSA.