40th Birthday Made 1977 Coaster Party Decorations 4 Pack Round Rubber Drink Cup Coasters Black A great 40th birthday gift idea perfect for any occasion. This 4 pack includes 4 coasters with the design pictured. Premium full color sublimation printing creates vibrant and long lasting colors. 100% polyester top and non-slip black rubber base feels just like a mousepad. Absorbant material protects surfaces from cup rings. Coasters give your table, counter top, or office desk some style and protection.