6 x 18l Really Useful Storage Boxes for £36 delivered, so £6 each. These are perfect size boxes to store your CD's/DVD's.
Free Delivery over £40 hence buying 6 boxes.
Use code TENPLUS at checkout to get it down from £40 to £36. Also, remember to go via Quidco or TCB for 8% cashback so potentially bringing this down to around £33.12