Marten:
Having spent some time in the Orient, a Bento Box is basially a small 'lunch box' in Japan.
So it is sort of an appropriate naming for the small boxlike bag that carries 'goodies' and fits on a bicycle.
Mel and Barb Kornbluh, the folks that operate TandemsEast are also fellow tandemists that just celebrated 140,000 miles of tandeming 2-gether.
Pedal on TWOgether!
Rudy and Kay/zonatandem