SIGG snack or lunch box
The SIGG lunch box comes in two sizes. The smaller one is about 800ml, and the large one around 2000ml (I have one of each - couldn't resist!) They are great for picnic-type lunches (onigiri, sandwiches, wraps), and are very lightweight and beautiful. Not cheap, but a pleasure to handle. The lid does not have a rubberized seal, so not suitable for very liquid contents. Swiss design rules!