High quality hinges and plastic on the box and tray. Mine has been through the dishwasher over 50 times and the image on the front has not faded, nor the plastic deteriorated at all. The sealed are still in tact and work 100% of the time. Even liquid-y foods get sealed in its individual compartment. Only downside is that it is very difficult to fit a sandwhich in it. There is no compartment that can fit a sandwhich no matter how the sandwhich is cut up. The freezer bag is great. I use it for the bento box or for other containers without the bento box. Easy for my kids to carry themselves too. Highly recommend!