The perforations are not sharp and deep enough making it difficult to remove the lid and separate sides without tearing the cardboard. I have not purchased these fir a few years so I don’t know if I received a bad lot or if the quality has generally gone down.
These boxes work but are very thin and not likely to survive abuse such as in stacking them. I’ve used them before and remember that they we’re thicker in the past. I won’t buy the again