I foresee an aweful lot of bin cage posts going up in here so I thought that a post to see them all would be a great idea!
This is mine, it looks a little small but it suits my robo biscuit as he doesn't seem to like big spaces:
It is 18L, there is mesh on the lid which is held on by cable ties tightly fastened:
I attatched the water bottle nicely to the inside. I used a long cable tie for this as well as the bit of wire which comes with the bottle:
Biscuit loves his pink elephant to sleep in so I haven't found the need to put in one of my home-grown beds yet! He has more toys but I took them out so that you can see inside a bit better.
I'm currently making one in the same fashion however it is in a 50L tub. These are both 'Really Useful Tubs' which I have found to be strong and safe!