I bought 4x the 65L option to store rarely used items on the balcony covered up by a blue sheet. The boxes are adequately robust for the price, but storing heavy items might break them over time. -1 star, because I would like these boxes to have a rubber seal, to protect the inside from humidity. I added a silicone seal lip (JIS 8060 ) by myself with a caulking gun, but it is impossible to tell, how well it works, since I cannot see how well it fits against the lid, you can only feel an increased resistance when closing it.