It is always possible to spot the tourist in Peru. They immediately buy an Inca Kola shirt. This is without fail. I did it (when I was new). My whole family did too, when they came down. The novelty never seems to wear off, and to be honest, I do not even drink pop, ever, but I'll drink Inca Kola. It tastes like cream soda, or banana pop. It goes well with lunch at the beach, or helps with that pesky 'tourist' hangover.