Promotional Black+Blum Stainless Steel Lunch Box Large The first truly leak-proof stainless steel lunch box. It is a 3 in 1, multi-functional lunch box allowing you to transport your lunch, cook dishes in the oven, and even store pre-cooked meals in a freezer. Made from durable stainless steel, this design is perfect for carrying your culinary creations in style. It harks back to the vintage army or camping canteens of old, but has a modern, minimal feel that will age beautifully. The silicone valve creates a secure vacuum sealed closure, the slider divider allows you to separate the contents with ease, and the fork + holder are added for convenience. Dishwasher safe base+fork. Lid and strap are handwash only