I purchased 10 rattan cabinets from Kmart (left the legs off, took off the leg base plates) and screwed them all together. I cut out and put moulding on the outside of the base cabinet on either side to create an area for puppy pads where our Chihuahuas are trained to go the toilet. They could be used for litter trays also. I painted the entire unit, attached it to the wall and then put some silicon matting on the bottom of each puppy pad area (in case of leaks), before adding disposable puppy pads. It's a favourite with the wife and the dogs. Works great for a fraction of the price of a similar unit.
Materials
Kmart Rattan Cabinets x 10
kmart Silicon Feeding Mats x 2
Sanding Block (for a light sand prior to painting)
British Paints Paint and Prime White Paint
Screws and Wall Attachment Hardware
Tools