There are so many plastic box that the choice is difficult. This closure principle (on the side) is very convenient. - Do not deform the cover - Easy to set - A "click" assures its closure and thus the tightness - Solid - Aesthetics
No problem for me. Ells are passed to the freezer, dishwasher and microwave. I also large formats.
Conclusion: If I have to take, it will be the principle.