On Mon, 27 Jan 2003 11:07:02 +0000, Pam Moore wrote:

The question is what to use as a liner for the rill. They want it
curved, and about 6 inches wide.
Does anyone know of a flexible material which would do?
They thought of a small ditch lined with butyl or some plastic
drainage channel, but aesthetically wanted terra-cotta!

Guttering? May not be available in terracotta colour though....