Hello, have the same ordered 2 "ZwEimer" and placed side by side. This results in 4 container. The cover I have marked with colored dots: blue (paper), green (organic waste), yellow (plastic, cans, packaging) and gray (waste). As a result tadallose waste separation is possible now. Am therefore very pleased with the product, because - The lid when touching the front button immediately (driven by a small spring) open automatically and easily connect again - The containers are space-saving and with 30 liters per tank still a good absorption capacity have (you do not empty trash every day! A giant Advantage for lazy people like me!) For the packaging waste I hang 50 l -Müllbeutel a (you can easily slide over the edge as 30 l bag), for organic waste and residual waste a couple of newspaper pages. Conclusion: Well thought product! Hope that the opening mechanism keeps long.