wanna share the Amazon link? does not fit my 4L cereal boxes, there seem to be at least 4 different versions of such boxes, I have 2 different with round openings on top, they have a slightly differently curved profile.
If you give me a Scan and one diamention I will make you one that fits.
But its this one
KICHLY Vorratsdosen (Set 6) -BPA freier Kunststoff Luftdichte Aufbewahrungsbehälter Aufbewahrungsbox Lebensmitteln Vorratsgläser zur Aufbewahrung von Nudeln Müsli,Mehl,Reis und für Futter Haustiere https://amzn.eu/d/6X0xjGS
thx a lot for the feedback. I noticed that over time they slowly get more lose so if you want to get 100% sure just fix them with a srew and heat insert(holes allready included in the design).