Nomad Lane is awesome! I have a bento bag and it is wonderful! Holds a lot and has wonderful organization! I girly their backpack for my husband and the large and small belt bags!
The bento bag was meant to be a personal item bag. The mini Beis bag is way too big to be a legitimate personal item bag you may use it that way and you may get away with it for now but it does not meet the measurements required for even US airlines as a personal item bag much less international.