From Wikipedia , Bento is a single-portion takeout or home-packed meal common in Japanese cuisine. A traditional bento holds rice, fish or meat, with pickled or cooked vegetables, usually in a box-shaped container.
There are different kinds of BENTO , My favourites are SAKE BENTO and MAKUNOUCHI BENTO.. Sake bento is a simple bento with a slice of broiled salmon as the main dish.. Makunouchi bento is a classic style of bento with rice, a pickled ume fruit (umeboshi), a slice of broiled salmon, a rolled egg, siomai etc.
I buy bento when I'm busy or not feeling well .. I love it because it's affordable and healthy .