The coolest (no pun intended) way to carry around your Bento Box and keep its contents cool/warm, the Bento Cooler Bag from Penny Scallan Designs also has a side pocket in which to put your drink bottle.

100% Cotton Canvas
Scratch proof easy-to-clean coating
Insulated and foil-lined
Mesh side pocket
Convenient carry handle

Dimensions: 255 x 200 x 95 mm