huang acrylic clear 4" coaster set (4" square coaster set with holder) huang acrylic the huang acrylic clear 4" square coaster set with holder is the coaster set for serving drinks at home or even outdoors. its elegant square design and sturdy construction make it perfect for the kitchen, dining room or bar. huang acrylic is an american company that is focused on quality, design, and style for the discerning customer since 1978.