I’m a frothy crown upon your brew, or bubbly lace where waves roll through.

I keep out intruders and keep in the sheep, With posts that are sturdy and panels to keep. I have plenty of links or sharp pickets of wood, And I've stood at the edge of the yard as I should. Though I never take steps, I go all round the yard, And crossing my path can sometimes be hard.

I am a glass tower with no doors, designed to hold liquid fire or frozen states. I have lips but cannot speak, and a neck that never turns.My flanks are marked with lines of measure, yet I rule over no land. Though I live in a lab, I have no tail to wag and no bark to give.

On a pole in the wind this tells you direction, Or do this away for your financial protection, Laundry day often shows at least one has gone south, Wag your tongue flippantly and get it square in the mouth.

I support the walk of the devil The same way as I do unicorns I get regular maintenance to keep level And my own protective gear of sorts