Stop in for a cup of coffee

I need to get some sort of edging along the front and side flower beds. The mulch keeps getting k kicked out into the lawn (the dog says she doesn't know anything about that).
Doesn't look like much in that pic(which is the way its intended)... I slope the bed down into a trench 3-4 inches deep and mulch so it ends up near level. Any weeds that creep in are easy to pull. Can run right to it with mower and no weed wacking required.