Scho-ka-Kola...a Germany dark chocolate nibble,it comes in small triangles of 100 grams,with a strong cup of coffee worth of caffeine.the round tin which is about 3 1/2 inch across and 1 deep is better than a Altoids tin for a survival kit.hard to find of course but check German grocery stores in the US that have sites on the web.during WW2 the German Army put benzedrine in it.