Iv just done mine and im very happy with them and they cost me peanuts
iv got 9 shelves wich hold a total of 36, 5 litre bottles or obviously a smaller ammount of bottles and your tools etc.
They are strong, sturdy, and waterproof, hold 4 bottles per shelf, and the total cost was around £60.
They are window boxes, like you plant flowers in, i got them from Homebase for £4.99 each, a few bits of wood and some screws and a mornings work and your done
I will try to post a pic latter