Compost bin, in a dry toilet ecological sanitation system.
<ul><li><i>designed in the shape of a toilet paper roll</i>.</li></ul>
<a rel="nofollow" class="external free" href="http://www.humanurehandbook.com/">http://www.humanurehandbook.com/</a>
<a rel="nofollow" class="external free" href="http://www.humanurehandbook.com/">http://www.humanurehandbook.com/</a>