This is a simple and comparatively cheap way to create a pebble pool of any size. Even the largest of water features can be easily contained using this method.
Please note: the reservoir in the diagram is for illustration only and may need a larger capacity, depending on the size of the feature. Remember, it's much easier to look after a large volume of water than a small one.
Reservoir & lid
Flexible pond liner
Bricks/stones for edging
Sand & cement