The ECOlunchbox Solo Rectangle has a large single compartment that's great for sandwiches and many other foods packed to-go. If you're looking for a non-breakable, easy-to-wash lunch box made from 100% stainless steel, the ECOlunchbox Solo Rectangle is a great option. The lid on this rectangular stainless steel lunch box does not have gaskets, so it's not appropriate for saucy foods since it may leak if tipped over.