Thirstystone 4 Pack Round Acacia Wood Absorbent Coasters with Decorative Resin Inlay. Acacia wood coasters are known for their natural beauty and durability. Acacia Wood has natural tannins that make it moisture resistant. Non-Slip Feet on bottom of each Coaster. Acacia wood has a unique pattern of grains and colors, which makes each coaster a one-of-a-kind piece. Acacia wood is naturally heat-resistant, which means it can protect surfaces from hot beverages. Add these attractive Coasters to any room to add that natural look to your surroundings.