Question about KIS Bi Box

The box is strong. With a lot of weight, the bottom will swell a little or the box will warp. And the lid is not airtight. As for the acid, it depends on the type...

Hello,
I bought this box 4 years ago and I still have it. I used it when I moved from Switzerland to abroad... and then I used it for various things. The latest is the Pon reservoir, which is a kind of sand for plants, and I'm very happy with it. The lid is solid and holds well. I have several crates, including some large ones, and stacking them is very practical.
I hope this review is helpful. Have a nice day.

Up to about 15kg, I don't know the rest