5 Compartment Bento Style Lunchbox with White Silicone Insert. Tucker Tin lunchboxes are stainless steel, low tox, stylish and durable, dishwasher safe, easy to open and close and have a leak-free removable silicone insert. With zero plastic, you can guarantee the health and safety of your family. Dimensions - 25.5cm x 18.8cm x 5cm. Made from 18/8 Stainless Steel and Food Grade Silicone.