set of 4 greyscale concrete modern coasters created in houston, tx.
all individually hand cast from custom rubber molds. colors are integrally mixed into the concrete and results in each piece being unique. recycled materials are used and are able to create a finished product 30% lighter than traditional concrete. not recommended for direct food contact even though sealer is food grade. some pieces will have very small natural pin holes.
do not submerge in water. wipe clean with mild soap and water.