How much would you be willing to pay for a lunchbox? In Australia luxury adult lunch boxes are becoming trendy. Brand Vaya Life has released a line costing up to $79 each. Each boasts VacuTherm insulation which the company says can keep food either hot or cold for up to six hours. Another luxury lunch box option is the Mealami, which looks just like a regular, leather handbag but is actually a functional lunch box, and it costs about $199.