In a few days I'll be cooking for my grand parents. Now I want to make it special so I decided to brine some pieces of chicken fillet before going there. But they live an hour traveling by bus from where I live, so I would have to carry the chicken in my bag. I was thinking of putting the pieces in a tupperware box along with some of the brine and wrap it in foil so that it won't spill in my bag. But I don't whether or not it will be still safe after I'll arrive. Any comments on this?