I bought a similar type of box before and used it, but it broke, so I bought it again because it was so easy to use. I think it has changed a lot since I bought it last time, which was about five years ago, but the box itself has become thinner. The previous one was much easier to use, as it slid around more smoothly. This time, there are reviews saying that it warps if you put heavy things in it, but even if you don't put heavy things in it, it warps, so it feels a little strange... I can't help but be a little harsh in my review because I'm comparing it to the previous one, but I want to continue using it happily because Nitori has the storage I want in the places I want to use it.