Goku Dragon Ball Z Insulated Lunch Sack After all, you can't go Ultra Instinct on an empty stomach. And trust us, with a training regimen as demanding as Goku's, you're going to be eating a whole lot of food!. With the help of this Dragon Ball Z Goku Training Insulated Lunch Sack, you should be able to carry all of the food you'll need to satisfy your hunger. Pack all of the noodles, rice cakes, meat, and veggies needed to keep up with the intense training you plan on going through.