This is an original Val St Lambert ruby overlay glass cut to clear sugar shaker/ muffineer. Super wheel cutting in a cane and fan type cut. I found this pattern in the 1908 company catalog where it is called pattern HF 16. There is a very thin flake on the bottom edge that is really impossible to see if viewing from the side on a shelf, etc.
Viewing from the bottom the thin chip is about 5 mm long and appears like a pointed end oval. Great looking in a display case with good light on it.