Grey waste bins
The grey bins are more environmentally friendly because they are made partly of recycled plastics.
Different types of waste bins
There are multiple types of bins and depending on the type of housing you live in, you might have different kinds of waste solutions - from bins and containers to underground waste solutions.
In the present system a single-family home will automatically get three bins at 240 L each - two of them with two compartments - where you can sort residual waste, food waste, paper & small cardboard and glass & metal. And one bin with no compartment - where you can sort plastics and food & beverage cartons. The smaller bins at 140 L and 190 L cannot be separated into compartments and can therefore only be used for one type of waste.
The bins come in different sizes. See the measurements in the picture below: