Knock-down bin

A knock-down bin comprising:

• (a) a substantially rectangular base having a first dimension and a second dimension;
• (b) a first two sides each having a lower edge detachably engagable with said base for deployment parallel to said first dimension;
• (c) a second two sides each having a lower edge detachably engagable with said base for deployment parallel to said second dimension, such that said first two sides and said second two sides meet to define four vertical corner portions;
• and
• (d) at least one locking element deployable to lock together adjacent ones of said first two sides and said second two sides at at least one of said vertical corner portions,
• wherein said at least one of said corner portions includes a hollow vertical corner post integrally formed with one of said first and second sides, said corner post having a vertical hollow channel and a lateral opening into said channel, said at least one of said corner portions also having a projection integrally formed with another of said first and second sides, said projection being configured to project through said lateral opening into said vertical channel of said corner post, said locking element being configured so as to be slidingly deployable within said vertical channel of said corner post between an unlocked position in which said projection can be inserted and removed from said lateral opening and a locked position in which said locking element engages said projection so as to lock said projection within said channel, thereby locking together said adjacent ones of said first and second sides.