These cool recycling and storage containers were created by the Italian design studio Flussocreative. They basically look like huge LEGO building blocks.
There are four different LEGO-style boxes in the series, two smaller onces in blue and green, which are supposed to be use for aluminum and glass respectively, and two larger ones in yellow and white, for paper and plastic. The models are specifically color-coded for the Italian recycling system, but they can be modified for a bunch of different uses.
Since they are based on the interlocking structure of LEGOs, they can be easily stacked in a variety of different configurations. My only question is this: with enough of them, could you build a house out of them?