The bin is composed of two different tubes. The two spaces are formed by stacking tubes.
The outside space is for paper and the inside is for other rubbish.
Each tube has a bottom and they are separable.
The outside tube is lower in order to take paper out easily,
on the other hand,the inside tube is the same height as A4 length and assimilates with paper.
Although it might be a good idea to hide rubbish, resources need not to be hidden.
This is the recognisable form that we are consuming them.