These are better than your average storage boxes/bins.  They have a total of six latches on each box that secure the lid on all four sides.  There is a seal in the lid to keep moisture and bugs out.  They also stack really nice.  The quality is great.  I can load these up with heavy items with no worry. I am using one of them to store books and newspapers and I am not concerned about too much weight. I am very happy with these.