Who knew that a concrete and ash mixture could be so functional and eco-friendly? This Concrete H2O Absorbent Coaster with a 3-D Empty Bottle design, features the highest quality water absorbency of any coaster set. Non-toxic recycled ash and cement create the perfect drink coasters and are individually handmade by thankful unicorns under a rainbow-draped sky. Okay, not unicorns, but people, and you can imagine how great of an impact every little bit of recycling like this has on future generations. A tiny empty bottle graces the corner alongside a seashell, reminding you of the importance of recycling without being pretentious or forceful. Let your wet glass sit atop a Concrete H2O Absorbent Coaster with an Empty Bottle design and do your part for the environment!