These coaster designs represent four of C.H. Guenther’s premium “patent” flour brands: the lead “Pioneer” brand, Magnolia, White Wings and White Oak. These brands were printed on barrels and sacks of flour in the late 19th century. The stone absorbent coasters are great for absorbing moisture and condensation. Coasters are line with quark underneath to prevent scuffing and scratching delicate table/counter surfaces.