... The valve is almost a bad idea for cereals. For type cereal corn flakes or other, so a little bigger, the hole is not wide enough so it mouth almost immediately, you have to shake the box (or flip back and forth) several times to fulfill its bowl, one is often tempted to completely remove the cover ... For small grains (oat flakes, rice, etc.) it must be suitable for the biggest grain is less practical ...
But otherwise the Lock & Lock quality is there, no doubt.