Snackoos are a kind of chocolate-covered snack food. Detective Ema Skye is frequently seen idly munching on them as a form of stress management, especially when she is trying to ignore people. She also throws them at people who annoy her, making a "ka-tonk" noise when they hit their target. She initially took to these snacks to cope with failing to achieve her goal as a forensic scientist, but even after she finally realized her dream, she was driven to eat them due to her interactions with Nahyuta Sahdmadhi.
Skye had a short-lived idea to make golden Snackoos, but gave up since the necessary additives for the gold color would have been harmful. Snackoos are also one of the many objects that the young magician Trucy Wright has claimed to be able to pull out of her magic panties.
In the Japanese versions of the series, Snackoos are karinto, a traditional Japanese snack food.